After a few weeks living in Equestria, it was safe to say David became a close friend of the Elements. He found it odd that ponies seems so relaxed and trusting of him, and after mentioning it, Twilight looked into it. Which involved lots of weird experiments, and jerk off sessions that he was fairly certain were not necessary. Eventually she came up with a hypothesis. He seemed to have some odd magic she'd never seen before coursing through him. It seemed to interact with others near him in interesting ways, playing into their natural magics and forming close bonds, so ponies would find themselves more drawn to him. The magic infused to him had been done purposefully, but Twilight couldn't figure out who, or how to interact with it. It was old magic, and powerful.

As life slowed down for him, David began to think more about what had happened, and the situation he was in. From what Twilight and the other Princesses could tell, there was no way of getting him back to his world. Not without finding out how he got here or who sent him. It was likely he wouldn't see his friends and family again. He had been diagnosed with depression as a teen, and usually he could just ignore it and move on, but with no way home, it became hard to deal with.

Ponies started to notice how sad and downtroden he was becoming. Ponies had a sort of sixth sense that helped them sense others emotions, and when the overly depressed David trudged his way through town, with horrible thoughts crawling through his mind, ponies found themselves drawn to him and attempt to cheer him up. Being a species with a society built around sexual freedom, trying to cheer him up often consisted of dragging him somewhere out of view and giving him a blow job. Or a boobjob. Or high impact cuddling. It sort of helped, knowing that all these ponies cared for him.

The time he spent with his new friends was enjoyable, helped his mental state greatly. These ponies were highly affectionate creatures, often picking him up to hug or kiss on him, nuzzling into his neck and the like. They were like that with all their friends, but they payed a little more attention to him. He liked it. He never got much physical contact with people growing up, and he ended up feeling starved for attention for most of his life, and these ponies gave him all the love and attention he needed. He always shared a bed with him. Because he was so small compared the them, they found that he made a good cuddle buddy. They often would invite him to join in on their sexual escepades, almost always leaving him covered in cum and highly satisfied.

Thoughts of his lost family weren't as terrifying now. Really, the only family he still had was his dad, and he was a dick. The loss of his friends stung a little, but they were kinda dicks anyways, as was evident by him getting left behing in the forest. The loss of his furry friends wasn't all that bad either, because deep down, he knew they'd want him to be here, surrounded by beautiful giant horse women and having fun sexy times with them. Living the dream they all wished they could. They would have been so proud of him.

Twilight took time everyday to help teach David about their world. He learned the basics of how magic worked and affected their world, he learned their history, and their customs. He learned that ponies could only get pregnant once every five years. Pony children were a rare site because of this, but they made up for it by being incredibly long lived. The average life expectancy of an Earth Pony was around 500 years, while unicorns and pegasai were more around 430 years. Twilight and her friends were around 120 at this point. Ponies were officially considered adults upon reaching sexual maturity, and having their first heat, which for them was around 50 years old. They would continue to grow larger until around 100 years.

He also learned where all that semen went to. It ended up at some place in Ponyville with a huge reservoir filled with the stuff, and was drained into barrels and then exported, or sold to special clients in the country. Apparently, their semen is highly sought after by beings all over the world, being magically charged and full of materials that make it useful for all kinds of things. It was also highly nutritonal, somehow. A mare that was productive enough could feed a whole family off of her loads for as long as she needed too. And it was used as such quite often. In fact, the whole reason the ponies species were monosexed cum factories was because of some old wizards from way back in ancient times, a good 10,000 years back, discovered pony semen's magical abilities and nutritional properties, crafted and cast a megaspell to turn them all into the cum pumpers ponies are today, and accidentally made it too powerful and turned every pony in the world into it.

Ultimatly, it ended up with a highly communal society that was comfortable being naked, and having sex openly, it made everything friendlier. In fact, in place of a large army, they had groups of Succubi Troopers that would seduce and calm potential invaders. It made diplomacy incredibly easy when the a countries leader just got fucked silly. David found all this shit hillarious, like some kind of bad fanfiction. Like, seriously, spermancers were actually a thing, they used semen to cast powerful spells wherever they went, and it tickled David to no end. Thinking out loud one time, he mentioned the funny thought of powerful robbed wizards with long beards tossing magical cum everywhere and riding a single, massive sperm as a mount. Surprisingly, this got Twilight snorting with laughter, right before she talked about Starswirl the Bearded, who was exactly that. His sides still hurt from that one.

It had been a month since he came to Equestria. It was bright and sunny out today, and David had decided he'd spend the day (and night) with Applejack. He'd taken to helping out on the farm some, though all he could really do was lift a single barrel of apples at a time into a wagon, but he found satisfaction in it anyways. He found himself growing stronger, and more muscular. He still had a layer of fat all over, but that was from eating so much food all the time in an effort to keep up his energy. Carrying barrels and getting blowjobs can take alot out of a guy. He was greeted warmly by the her family upon his arrival. He'd often stop by to have dinner with them and spend the night.

Night time came quickly, and they all began to shuffle off to bed. David met Applejack in her room, and found her naked, and crawling into bed.

"Heh, I can see some really ripe apples from here," he said as he approched the bed. Applejack grinned at him, and shook her rump at him, swinging her swollen testicles around. They grew slightly, anticipating the fun night ahead.

"Betcha can't wait to taste em, huh?" She flopped onto her back, and waited for her cuddle partner.

"You know it Applesack." He crawled in next to her, and siddled up close to her side, causing her to close her arms around him and hold him close, wedging his head between her breasts, and resting her dick between his legs. It throbbed and grew slightly, cum dribbling out the tip.

"Mmmm. You're a cute one, ya know?" She nuzzled the top of his head lovingly, purring in contentment. Instead of responding, he simply sighed and snuggled in closer to her. He loved this, cuddling with all these wonderful, loving mares. He closed his eyes, and quickly found himself asleep.

Only to be awoken a few hours later to Applejacks tits smothering him. He quickly pulled himself out from between them, taking deep, frantic gasps. Applejack moan unhappily, before her eyes fluttered open, and focused on him.

"Som'n wrong s'gercube?" she slurred sleepily.

"I think your boobs have grown some AJ." Her breasts had indeed grown larger, from their usual grapefruit size, to the size of watermelons. And it looked like they were leaking milk heavily.

"What in... oh. Huh, that's new," she took an experimental squeaze, spraying milk over onto the floor. "Well wouldja lookit that? Granny Smith was right. I am a milkin' mare." She took notice of David staring at the milk dribbling out of her engorged nipples.

"Oh? Is somepony hungry?" David nodded slightly, basking in the glory of Applejacks new breasts.

"Well, this milks gotta go somewhere, and we dun have a milk pump here at th' barn. So go ahead and drink up Sugercube, have all you want." Applejack sat up, and held her arms out to him. This was something he had learned from Twilight as well. Sometimes, mares would grow into milking mares, increasing their breast size significantly, and causing them to produce alot of milk. They also tended to act more motherly when they were full, trying to get anyone and everyone to suckle them.

David was happy to oblige. He reached over and grabbed one of her breasts, playing with it some. it was very firm, and dribbled milk with every movement. Slowly, he guided his mouth to her nipple, latching on eagerly, and began suckling. Applejack moaned quietly, enjoying the new sensation. His hand reached up and grabbed her other tit and playing with it, spilling milk all over his hand. Applejack held him in her arms, gently petting and nuzzling his head as he drank. Her cock and balls slowly grew, pulsing slightly, and leaking pre everywhere

Ten or so minutes later, he had drained the boob dry. It was still huge, but no longer leaking milk. His stomach bulged with all the milk he drank, but he didn't feel full. Twilight hypothesised that the magic in him made him more... malleable and stretchy. The other tit, however, had grown larger, and was spraying a stream of milk all over the bed. He switched sides and began on the other one. Applejack continued her cuddling, and hummed a song to him as he drank, causing her whole chest to vibrate. David grew sleepy as he gulped down the white gold, slowly closing his eyes and enjoying the humming. By the time her breast was drained, and his stomach filled, he was fast asleep. Applejack looked down at him, and gave a motherly smile.

"Hmmm, that'sa good boy, sleep fer mama." She lowered him into the bed, before lying down next to him, Pulling him in close for another cuddle. Her cock, however, wasn't ready to sleep, throbbing and leaking out cum. She placed her cock between his legs, rubbing up against his sack. Laying back down and holding him closely, she began to hump. It started up slowly, with tiny moans and a small trickle of pre. As the minutes passed, she thrusted harder and faster, her cock growing plump between his legs, and her balls growing out over the end of the bed. The cum came out hard and fast, spraying out onto the floor, leaving a puddle there. Her breasts had grown again, and were spraying milk out between the two of them David still slept through this, unlikely to wake up because of the magic her milk had. Her humping was still giving him pleasure though, smiling in his sleep as his cock throbbed slightly and leak beads of pre.

More time passed, and her cock had grown even larger, precum splattering against the wall, and causing the room to fill with cum. Her now massive balls throbbed hard as she felt her oragasm approaching. She stopped humping, and pulled her cock out from between his legs. Moving off the bed, she picked up David, tucking him under her massive breasts, now at least three times the size they were earlier, and then walked through the cum over to the end of the bed, her cock and breasts spraying all over the place as they bounced around. Milk was now rocketing out of her breasts, leaving just as much milk as there was cum to fill the room. She placed him longways on the edge of the bed, feet pointed towards the pillow, and his head hanging over the side, mouth wide open. Still asleep, but very much arroused, his dick had grown some, and a steady stream of cum came out of it. Constant exposure to these girl's magic cum had begun to affect him. She then stepped back some, and lifted her cock. She positioned it so it was in line with Davids mouth, spraying cum in his mouth and on his face, and moved forward, cramming her massive cock into his mouth, and down his throat. His mouth and throat stretched and bulged to allow the massive girth pass into it. Slowly she inched it in, his stomach beginning to grow larger from the constant stream of pre. She stopped once she hit the medial ring, before pulling back out, and thrusting back in quickly. Milk sprayed out across the bed.

She throat fucked David hard and fast, panting and moaning from the feeling of his mouth around her. Faster and faster she thrusted, until her balls began to pulse hard, signalling her orgasm. She threw her head back with a throaty moan as cum traveled down her cock, and into Davids stomach. His stomach ballooned outwards, filling with her warm seed as she emptied herself into him. His stomach grew massive, and eventually, refused to grow larger. The cum kept coming however, and Applejack found herself pushed out of his mouth, until it poped out, spraying gallons of cum all over his face and onto the carpet. Cum and milk rushed out of his mouth as his stomach shrank, and his cock throbbed with its own orgasm, spray out strands of cum for several minutes. Applejack grabbed her throbbing cock and pulled it upwards, stroking it, and spraying cum against the ceiling. The room continued to fill.

Despite her orgasm, her cock, balls, and tits continued to grow, and sprayed out harder and harder. She had gotten to into in, too carried away. This wasn't going to stop anytime some. She had moved across the room, almost swimming in cum, until she reached the door to outside, which she eventually opened, causing a wave of cum and milk to rush out over land. Sqeauzing herself out the door. She held her cock out towards the apple orchards, and started pumping her cock hard. The cum came out even harder, reaching out to the trees, and then going further, the milk following shortly after it. She was covering all her land in her seed and milk, screaming out loud as she did. She did this every so often, and said it was good for the apple trees, making the apples grow larger and tastier. Eventually, her whole body began to grow, gaining foot after foot of height. That had not happened before, however. Her cock and balls kept growing and shooting out seed over the landscape, the sound of it leaving her tip sounding like a massive waterfall. Her balls groaned and churned loudly, echoing across the farm.

By the time dawn came round, she had grown to thirty feet tall, and her dick, balls, and breasts had grown to match. She had sat her massive ass down on the ground, unable to hold up the weight anymore. Cum rocketed miles into the air, spreading over the entire town and drowning everything in her seed. The crown would pay her well for this, as it helped fertilize the land for miles around, making crops grow better, and larger. She could hear screams of pleasure from town. Her cum acted as an aphrodisiac, and the ponies in town being covered by it were busy getting themselves and each other off to it. She'd been able to cover large areas with cum like this before, but never had she grown so large, but she so very much loved it. She hoped she could stay this size forever. She felt something tickling her butt. Hearing his light grunts through her own screams, she deduced that David was awake and humping her ass. It made her happy.

Author's Note

Significant amount of clop added. Macro growth and the like. Expect more to cum