Waking up in my bed the morning after my fun time with Rarity, I was unbelievably comfortable and not quite ready to wake up. Rubbing my eyes, I peered over at a calendar I kept by the door for reminders. Seeing a circle with an exclamation mark I knew that Twilight wouldn’t let me stay in bed all day, with a final stretch of all my limbs I swung my legs over the edge of the bed. Looking through a drawer for today’s clothes I set about dressing myself, taking a closer look at the calendar for the details and not just to know I’d be busy. Seeing the words checkup, and also bakery underneath it, I figured helping Pinkie after the checkup would cheer me up. Not that I’d be particularly down but Pinkie knew others better than they knew themselves, so she’d notice I wasn’t lively after Twilight’s checkups a long time ago. Kinda why I made a reminder to myself to visit. Moving aside the curtains I opened the window and made my way out of the room. Twilight had been nice enough to give me, one of the reasons I agree to a lot of her requests.

A pleasant scent met my nose on the way down the stairs. Taking a moment to look around the library, I smile to myself in anticipation of the meal Spike had prepared for breakfast. As I entered the room Twilight looked about done with her meal, Spike having finished his own and getting started on his dishes. Twilight looks up from her forkful of hashbrowns and perked up, always excited for these checkups more than myself.

“Goodmorning Twilight. Goodmorning Spike, breakfast smells great, you never disappoint.” Pulling out an empty chair I scoop the leftover hashbrowns, pancakes, fruit slices and buttered toast. While the toast wasn’t fresh out it was still good, ripping pieces out and scooping hashbrowns with it. “Goodmorning Alex, I was about to send Spike up to get you in the next 5 minutes if you hadn't woken up.” Finishing the remains of her plate she floated the plates to the counter for Spike to clean, who had moved to the toaster and put new bread slices for me. “ I’ll be down in the basement getting everything ready for us. Take your time but don’t keep me waiting please.” With that bit of contradicting instructions out of the way she left the kitchen. Looking to Spike, wearing his white frilly apron wrapped around his torso, he carried a small plate with fresh toast, plenty of butter slathered on for my enjoyment. Grabbing the plate from his claws I gave him a kiss just above his eyes, being sure to exaggerate the kissing noise to convey my appreciation. “Thanks Spike, you’re the best.” Seeing his cheeks glow with a hint of blush, he accepts my thanks on his way back to the sink to clean Twilight’s plate, tail wagging to and fro. “No problem Alex, it’s no trouble.”

While he tries to hide the emotion in his voice he can’t quite get his natural body's reactions under control, not that he himself notices. Working on my breakfast I make sure to properly savor not only the meal, but the spectacular view before me in the shape of Spike from behind. While shorter than a pony though not by much, I’ve been assured by nearly everyone that Spike is, in fact, a legal adult. His lithe frame gave him a more feminine figure, along with thighs that looked softer than they had a right to be made out of scales and all, not to mention the object of my focus. It practically demanded my attention, that full pudgy ass begging to be spanked just to watch the way it jiggled. With his tail still wagging back and forth that ass wasn’t staying still, whispering to my pervy mind just how much it would move with a proper motivator. Not wanting to risk Twilight getting impatient with me I hurry to finish my plate, setting it on the counter. Peeking out the kitchen to where the basement door stood, I took the chance to get behind Spike and wrapped my arms around his generous waist, being sure to press his ass against my crotch and slowly gyrating our hips.

A squeaky gasp rushes from his lips, turning to mewls and purrs from his soft ass rubbing my twitching cock. Kissing my way from his neck to his cheeks I can’t help teasing the femboy some more, rubbing my index and middle fingers along his lips. Like the good boy he is, his tongue sticks out to lick at my fingers, and for his reward I push them into his mouth after switching to my middle and ring finger for more thrusting power, to massage his slimy muscle. Angling my hand up tips his head back where I can look him in the eye as I go about finger fucking his mouth. Wanting to push him a bit further to test if he’d been practicing like he said he would, I reach further into his mouth aiming to at least feel the beginning of his throat. Closing his eyes, holding his breath, he focused all he could on not having an accident in the kitchen. Not because he’d make a mess for him to clean, but because he wanted to prove he could now handle more of my cock.

He was making progress, nowhere near Rarity’s level but few could match her love of being roughly facefucked, but I promised him we’d get there one day and he deserved a reward. Not right now as I’m sure Twilight was close to finishing her preparations so I’d save it for later. I kiss his temples and sweetly whisper to him, “I’m gonna finger your throat now, take a deep breath. Remember, don’t be afraid to gag and try to fight it, that’s exactly what I want to feel around my cock when I fuck your face later, ok?” I wait for him to take his breath, steady himself and open his eyes. There was a quiet resolve in those emerald eyes, and a hint of whimsy conveyed not just through his eyes but that shapely ass he made sure to grind on me. Smirking at his playful attitude, I felt he needed a reminder who was in charge. Clamping my arm around his waist tighter than before, I spat in his mouth to give me a bit of lube in addition to his own saliva. A quick look of shock replaces his steadfast stare, though that too falls away as he shuts his eyes and his face scrunches up to focus. Having my way with his throat, my fingers stimulate his glands and more saliva forms . With the rough treatment he was being subjected to he quickly starts to gag, the walls of his throat clenching around my fingers. With the rapid thrusting of my fingers the saliva foamed and thickened; taking on a more slimy texture making the finger fucking that much slicker, a furious schlicking bouncing off the kitchen walls.

“Relax, you’re doing so good.” Kissing his face I snake my hand from his waist up to his neck and slowly rub his throat. The gagging increases with the amount of thick drool now pouring over his mouth, lewdly splatters over my hand and the top of his apron; just another reason I angled him back. “Good boy, Spike. I think you’re really ready for a proper throat fucking. I’ll try to find time for you, with any luck Twilight will have to go off on another adventure in the next few days. We’ll have the whole house to ourselves, picture it Spike. An empty house, a full day with your throat and my cock bumping and grinding.” With that being said I slow down the fingering gradually to not upset his concentration, finally lifting the slimy appendages from his mouth. My cock could not be harder, having been staring into the throbbing drool filled fuck hole I had the pleasure of finger fucking. Closing his mouth and holding it closed with my drenched hand, I tell him “Swallow it.” With slow, but surprisingly steady gulps he drinks the foamy slime down. Popping open his eyes to see me, I take my hand away for him to show me his empty mouth, sticking his tongue out for good measure. Turning his body to face me, I bend down to lick the drool from his neck up to his hanging tongue; pushing it back into his mouth, now holding his head between my hands as we twist and turn our tongues together.

Before I become absorbed in making out with this loveable dragon I force myself away, hot clouds of breath puffing out in our faces. Reaching around and patting his ass I wipe my dripping hand on his face to clean off the slobber. “Take your time cleaning up Spike, we’ll probably be down there the next half-hour if the other check-ups have anything to say.” As he slowly drops to his knees, overwhelmed by his treatment and more horny than I’ve seen him if that cute bulge poking his apron out and sticking to him said anything. Leaving him in the kitchen to recover and clean himself up, the door to the basement slowly begins to open. Nearly jumping to the door so Twilight doesn’t see anything, I see no one behind the door but the soft glow of magic surrounding the doorknob. Sighing to myself that Twilight was too lazy to walk up the stairs and open the door herself, I still pressed myself between the open space of the door and the wall and quickly closed the door behind me, making sure to lock it. At the door closing Twilight turns from her clipboard, no doubt with a checklist we’ll work through for the check-up. “Oh, good. I was about to call out to you to ask what was taking so long.” With a small grin on her face, lightly prancing in place she begins to levitate everything into place from beakers to needles, small blades and strips of various materials.

Holding in a strangled sigh, I mentally prepare myself for the new and repeated tests she thought up for this month. “Yeah, sorry ‘bout that. Just making sure I enjoy the meal Spike made.” Knowing some of these tests would need me naked I figured that taking all my clothes off is the first thing to do. While I undress Twilight makes a check on her little list, not one to let even something munade escape her list. Though the small pout on her face brought a smile to mine. “Eager to get started I see. A bit too eager, we skipped the first few checks.” Not really my fault, if getting undressed wasn’t the first thing on the list she should tell me what kind of tests we’d be doing beforehand.

About half-an-hour later I was sporting various cuts, bruises and burns; the more severe had healed rather quickly while others took their time, though admittedly much quicker than they had any right to. “Fascinating as always Alex. I still can’t believe how your body self-regulates and decides which injury takes priority. Not to mention you claim this isn’t your natural recovery speed.” Focusing on slowing my heart rate, sweat dripped down my body from the pain. One of the reasons I agreed to these tests are me also wanting to know the new limits of my body ever since I popped into Equestria, the other being I know she doesn’t take enjoyment from inflicting pain; it really is only about science for her and learning about a new species and what we can do. I’ve of course told her that whatever is in the air here, which she long since explained was the ambient magic field, had changed my body and any data she gathered on my species is heavily exaggerated. She’s accepted that she won’t have perfectly accurate results on my species as a whole in favor of having accurate data for any other would-be-humans that might also be transported to Equestria. Fat chance of that happening, and honestly I hope it never does. While there’s plenty of warm, cuddly and loving creatures to go around I have no desire to share, even with one of my own.

“Well, with all those other tests out of the way let’s get on with your favorite.” As she’s saying this a container looking around the size of 3 liters is floated over to me on her magic. With a quick cast of magic a fast cooling lube is applied to my limp junk, and honestly it isn’t helping to get it up any more than the light torture I endured. While I don’t mind a bit of pain in the bedroom, that’s in the moment when my brain is translating it to pleasure. With surgical precision her magic lifts my head and pulls away the foreskin as she vibrates the glans. The lube is spread to the exposed head and along with the vibration the lube warms up, replacing the cool sensation. With this new change my cock twitches to life and slowly enlarges, grudgingly if anything. There’s a reason I don’t enjoy these check-ups, apart from the various tests and it has to do with these ‘sample gatherings’ Twilight insists I enjoy so much. Really, I’m sure she’s the only one who enjoys this, and not even in an erotic sense. With her there’s no passion, no love or even affection. It’s all clinical and for the sake of running other tests on my semen for any experiments she could think up, but it’s basically the only way I can get myself reliably tested for any pony STI’s I might one day contract. Not to say me and my various lovers aren’t taking care of ourselves and cleaning when needed, but better safe than sorry.

Looking down to the container floating near the tip of my penis, I mused about the fact that if this was Rarity, Pinkie, AJ or Spike that container couldn’t dream of holding all the sperm I could pump out. With her glow of magic forming a ring around the frenulum it pushed its way down my shaft, once it met my pelvis it pumped itself back to the tip where it once again makes its way down and repeats itself vibrating all the time. “Impressive size as always Alex, I really have no idea how my friends handle it.” The edge of my lips lifted a bit, knowing this was barely half of what it could reach but if I ever told her about it she’d try everything she could to get the full measurements out. After being intimate with each of my lovers I made sure to ask them not to tell her just what I could do or put out to avoid what I could only see as a drawn out sexual torture that wouldn’t end no matter how or what she did to force it out. Not wanting this to last any longer than it needed to I focused on my core and the vibration travelling up and down, from pelvis to tip. Willing my testicles to produce a load as fast as possible, within 5 minutes of her starting her treatment of my penis I felt the beginning of it shift toward the back of my urethra where it slowly surged itself out the tip. With a little “Oh!” Twilight brings the container closer so as to not spill a drop, the magic field working itself faster while constricting just a smidge tighter to squeeze out as much as possible. The container slowly filled with sperm, edging closer to the 2-and-a-half liter mark. “Wow, more than last time. We really need to determine just what it is that decides the size of your sperm output, it isn’t as consistent as I’d like.” Her eyes glued to where my tip meets the container, barely paying me any mind other than as the supplier of her latest samples.

Honestly the larger than average load, in front of Twilight anyways, probably had to do more with the frisky time I had with Spike before getting to the basement. Note to self, don’t get frisky before these check-ups. No need to get Twilight riled up with better or otherwise enhanced results. With the flow of sperm slowly drying up, Twilight wasn’t one to let a single drop be left untapped. Pushing the ring of magic back to my base she shrunk the field to what was bordering on uncomfortable to painful in strength. With my body now being what it is, my penis was able to strengthen itself enough where the pressure eased up a bit and all without Twilight noticing with her magic. Some few drops were forced out, Twilight having a look of concentration like one would when trying to squeeze every drop out of some citrus fruit. As the last drop hit the rim and slid down into the container she, at last, dropped her magic field allowing my thoroughly juiced penis to fall limp and retract in size. Exhausted barely covers how I feel, and the only thing keeping me going is the thought of seeing Pinkie soon. Twilight had already carried the near full container over to her workspace where various tubes, burners, beakers and vials were set in ways only she knew how to work. Nearly forgetting about me already after getting what she wanted, she absentmindedly waved her hoof behind her head and called out, “As always it’ll take me anywhere from 2 to 3 days to tell you if there’s been any changes to your sperm. I’ll be sure to let you know if anything pops up.” With all this unpleasant business taken care of I gathered up my folded clothes from where I had placed them and dressed myself to get the hell out of there. Not that Spike would mind me walking around the house in the nude, I had another bootylicious creature to spend time with and I did not want to keep her waiting if I could help it.

Author's Note

Got this out as quick as I could after the positive reaction it received, thank you to everyone who added it to their favorites and tracking. I can't go to everyone's profiles and leave a message but I honestly appreciate everyone who does. Thank you again and I'll try to work on the next chapter soon.