Powerjizz, or how Spike stopped being frustrated and learned to love two Mares

"Now, Spike, before we get started, I want you to know that I know being my assistant is a very stressful job, so I understand if you've done certain... Things to relieve your stress." Twilight began. The duo were back at the library, with Spike seated in a chair, munching on a bowl of gemstones as the unicorn paced nervously about a chalk board and a few other learning aids. "I know you might be embarrassed, but know that I won't think any differently of you. In fact, I sometimes left off steam the same way."

"Really?" Spike asked. Twilight nodded an affirmative. "So I'm not the only one who stands in front of the mirror and does muscle flexes?"

Twilight sighed. "No Spike, that's not what I meant. What were you doing out on your walk?"

Spike suddenly became nervous. "I just went out for a little stroll, going by Sweet Apple Acres for the scenery. I must have fallen asleep in the hay when it came to life. Sorry about that."

Twilight decided to be blunt. "Spike, I know you've been masturbating."

Spike's scaly face lit up bright red. "Well can you really blame me? You and the other girls walk around naked all the time! I can't help it if I get a little... excited!"

"Spike, I already told you, I'm not judging you." Twilight reassured. "Still, I discovered something a little bit worrying in my research. You see Spike, dragons are intensely magical creatures, right down to their... Semen. I believe your semen has been causing the activity we've been experiencing recently." She then shuddered as relalization struck her. "And do a better job cleaning up from now on!"

"Well, I normally wash my bed sheets after... Doing it, but with you and your crazy "research", I kept needing to find a new place!" Spike defended.

"I know Spike. Thankfully, that section of our research is over." Twilight reassured. "Now, we need to make sure no further incidents occur. To that end, I'm going to need some... test samples."

"Well, uh, I'm sure Applejack isn't going to want that hay anymore. Do you want me to go get that?" Spike asked.

Twilight rolled her eyes. "No Spike, I need a fresh sample." The purple unicorn explained as Spike began to look nervous. "I've set up some pillows in the next room, so take this bowl..." She instructed in a scientific tone while gesturing to the now empty gemstone bowl, "ejaculate into it and bring it back so we can better understand this phenomenon."

Spike stood up with a sigh, grabbed the bowl, and dutifully entered the bedroom, shutting the door behind him. Twilight sat by the door, patiently waiting for her assistant to finish his task. After fifteen minutes of patient waiting, the purple unicorn couldn't help but knock on the door. "Spike, is everything ok in there?"

"Uh, yeah, everything's fine. Just, you know... masturbating." Came Spike's nervous response.

"Spike, I'm coming in." Stated Twilight before walking in slowly.

"Wait, I'm not decent!" Exclaimed Spike, and indeed, he was not. Twilight had never seen her assistant aroused before, and couldn't help but be fascinated by the anatomy of dragon reproductive organs. His testicles seemed to be entirely internalized, as she had long since deduced, but the "means of delivery" were rather unique. The loin scales between his legs had slid back, making way for his surprisingly impressive shaft. The nature of the shaft itself was rather odd. It wasn't composed of scales, but instead of a thick rod of rather stiff material stuck halfway between scales and skin.

Twilight couldn't help but blush a bit. Though she had no idea how her assistant would "stack up" compared to other dragons, by pony standards, draconian physiology had given the young dragon a rather impressive cock. In addition, since his sword was usually sheathed in resilient dragon scales, Spike was immune to a typical male weakness, something many an unfortunate stallion throughout history could covet.

"No reason to feel shame Spike. It's just two friends researching biology." Twilight re-assured, despite feeling a growing heat inside herself.

"You're right, sorry I shouted Twi." Spike replied. "And I'm sorry about the wait, but I just did it in Applejack's hay, like, an hour ago."

"I know Spike." Twilight stated. "But time is of the essence, and I'm afraid I'll need to take a more hooves on approach to this investigation!"

Spike's eyes went wide. "You don't.. We can't... You can't mean that... Twi, NO!" He babbled back, confused and startled by the unicorn's direct approach. "I want to save myself for Rarity..." he added in a softer voice.

Her assistant's response gave Twilight Sparkle pause. In her zeal for knowledge, she had become inconsiderate to the feelings of a friend. After making a mental note that that is excellent friendship report material, Twilight sighed apologetically. "You're right Spike, I shouldn't rush you on things like this. You can take the rest of the day off. We can continue this when you feel up to it."

Twilight turned to leave, ashamed at having nearly exploited a friend like she did, when Spike called out to her. "Twi, wait. We can do this now if you want. Better sooner then later." He explained. "Plus, I do kinda need to get rid of... this." He added while pointing to his boner.

"Are you sure? I don't want you to feel like I'm forcing anything on you." Twilight asked. Spike nodded an affirmative.

"Yeah, it's no problem. I mean, a little... assisted masturbation doesn't count as popping your cherry, right?" Spike reasoned. "And it's not like this is anything serious. Just some science between friends."

Reassured that she wasn't in the wrong, Twilight trotted forward to gather the essence. "Just lay back and relax Spike." She stated softly while rearranging the pile of pillows into a flat surface, allowing the waiting to dragon to lay flat. (Save his firmly erect hard-on, of course.)

After reaching her assistant's side, Twilight fell to her haunches as rubbed her hooves over the firm dick in a way she hoped was sensual enough to make Spike cum, having only her own experiences to draw upon.

The purple unicorn couldn't help but feel heat build up in her loins as she fondled the erect cock. The organ was a spine tingling mix of rock hard and skin smooth in her hooves, and seemed to posses and internal heat that warmed the recipent in a fabulously sensual manner. Twilight attributed this Spike's dragon biology.

The man himself was shifting about in a warm sweet, crimson dancing across his face. Sparks seemed to run down Twilight's hooves and into his body, yet something wasn't right. The smooth, slow hoof rub wasn't unpleasant (indeed, the gentle fondeling was sending shivers down his spine as a pleasant warmth settled in his stomach) but Spike just didn't feel the familiar building pressure inside his very core that signaled an approaching orgasim.

Seemingly picking up on her partner's thoughts, Twilight faced her assistant and asked "Do you feel anything?"

Spike exhaled a hot breath, unwittingly causing Twilight to blink her eyes as the hot breath sent a blush across her face and a wave of heat down her throat. "You're doing a good job Twi, but something is missing." He replied. "I think it's your hooves. They just feel kinda... off."

Twilight contemplated this for a moment. It seemed logical that her hooves might not be able to bring a dragon (whose brain was wired to work with hands) to climax, especially considering Spike was a bit drained to begin with. After this deduction, Twilight decided to use the universal method.

Spike looked up as he felt the hooves pull away. "Twi... Do you wanna stop?" His question was answered a moment later as the lavender unicorn's tongue ran up the side of his dick in a long, slow, wet lick. Spike's mouth expressed his feelings with a moan as the familiar feeling finally built up in his loins.

Twilight moved her mouth over the tip to better stimulate the end with not only her tongue, but her hot breath as well, which sent waves of warmth down the erect member. Pushing things a bit further then was probably wise, Twilight leaned over to wrap her tongue around the very tip, pressuring the head of Spike's erection with coil of mouth muscle.

That proved to be too much for Spike. "Twilight, I'm gonna...!" He yelled in vain as the pressure in his loins was suddenly released. Twilight had just enough time to pull her tongue back into mouth as the sweet yet salty stream of dragon cum flowed into her mouth. The sperm was pleasantly warm, similar to the baths at the Ponyville spa. The lavender unicorn could feel her mouth and throat muscles unclenching as she swallowed the seed.

After getting it all down, Twilight remained stunned for a moment, before snapping from her surprised daze. She was about to reprimand Spike for ejaculating too soon, when suddenly a wonderful sensation washed over the unicorn. A warmth seemed to spread out from her stomach to the tips of her hooves to the point of her horn, which was brightly aglow. As her perception of the world widened, Twilight couldn't help but feel she had experienced this once before: The day she got her cutie mark.

A couple of test spells later, Twilight was sure of it: Spike's semen had boosted her magic. "Spike, this is an amazing discovery! The implications of it are..." The excited unicorn stopped when she noticed Spike had collapsed from exhaustion, and was snoozing upon the pillows as he penis retracted back beneath his scales. Twilight simply smiled at him, levitated over a blanket (that she resolved to thoroughly wash later, along with the pillows), and let the little guy rest. After all, he had earned it.

A/N: Okay, so, that was my first attempt at writing clop EVER, so I hope it was passable. If I need to do anything to make later chapters more enjoyable, please tell me.