Human-To-Experiment 2, Log #1

Subject #299 found themself glued to Dr. Horne's lower half, the tightness of their new form giving them an intimate understanding of Dr. Horne's anatomy. As the Doctor ended the recording, he let out a small sigh and pulled at the back of the new panties, attempting to keep them from crawling up his butt, but to little avail.

"I was positive I'd chosen the correct size for my underwear..." Dr. Horne murmured to himself. "Perhaps I've put on weight." Without further ado, nor acknowledgement of the person he was wearing, the doctor proceeded with the test.

Hooking both his index fingers into Subject #299, he pulled them as wide as they would stretch against his body, causing them to wince in pain as their threads were pulled taut against Dr. Horne, with the doctor's cock being completely detailed within the fabric of the panties thanks to just how skin tight the subject was truly pulled.

"Very little stretch on these..." Dr. Horne hummed to himself, the use of the term 'these' rather than 'the subject' or 'you' not going unnoticed by the subject in question. It was almost as if the doctor had already disregarded them as once being human, and they now truly were nothing but a pair of panties to the scientist.

"And now..." Dr. Horne muttered again as he bent down to touch his toes, that stretching sensation once again filling the subjects body as they were pulled thin across the massive landscape of skin that made up Dr. Horne's ass. The subject felt their a thread snap. Then another and another the longer the doctor stayed bent over in this position, each coming with a tinge of pain as they were forced to hold themself together as the doctor's ass tried to quite literally pull them apart.

"And up." Dr. Horne completed, standing back up and allowing the subject relief as the stretching ceased. "Held together decently, though the sound of slight tearing was notable. If they were the correct size for my frame, they would have certainly been fine...." The doctor paused a moment, putting a hand to his chin.

"On second thought..... MR. VEGA, WILL YOU COME HERE A MOMENT!!" Dr. Horne shouted towards the doorway as he began to pull the panties off his body. As the subject dropped around Dr. Horne's ankles, so too did their heart sink. And as the sliding door automatically opened, the subject could do nothing but stare up at the half naked doctor as his assistant stepped in.

Dr. Horne was certainly a well endowed individual, with a posterior far larger than most men the subject had ever seen. Yet, Vega was on a completely different level. The man's butt jiggled with every step, his enormous hips swaying from side to side, and the bulging member in his well-worn yoga pants drawing far more attention than the man possibly realized.

"How could I assist you, Dr. Horne!" Vega chimed in his peppy tune, standing in place and swaying back and forth as he tried not to stare at the doctor as he dressed himself back in his usual garments, leaving the subject limp on the floor. He gestured in the subjects direction.

"You. Remove your undergarments and replace them with those. Let me know how long they last." Dr. Horne spoke disinterestedly in Subject #299's direction, their fate truly beginning to sink in as they began to panic, with Dr. Horne watching their readings on his tablet. 

"Righty-o, doc~!" Vega happily complied, understanding the individual was likely a test subject and thus making the boy more than happy to comply. He peeled off his yoga pants and panties, tossing said panties off to the side before he stepped either foot into the Subject at hand.

"Upsy-daisy, little guy~!" Vega cooed excitedly, pulling the subject up to about the middle of his thighs with ease before he was forced to stop. "Uhm.... Dr. Horne, these panties... they're--" He began before getting interrupted.

"I'm aware, do your best." Dr. Horne instructed, turning his attention to the intern at hand who began to worry a bit. Not wanting to fail the doctor, Vega simply nodded before beginning to hike the subject up the final stretch of his legs.

It was a notable effort pulling Subject #299 up his thighs, the subject stretching outwards to get around the sheer girth of Vega's thighs, with the true horror inching ever closer. The hem of the panties hit the bottom of Vega's asscheeks, with the assistant sucking in a deep breath before trying to pull the subject around the bend, as it were.

If Subject #299 could scream, they certainly would, as their body was immediately stretched to its absolute limit as Vega yanked on them, their meaty cheeks slowly beginning to fill the subject and pull at their threads. Vega let out a small groan of effort as the pulling continued, tugging the subject about a third of the way up his enormous posterior before the panties in question began rolling in on themselves and back down to the base of Vega's butt.

"I-I'm not sure these will fit, Docto--"

"Let me." Dr. Horne interrupted once more, walking behind Vega and gripping the panties. "Keep it together, #299, you have the rest of the day ahead of you." Dr. Horne whispered, before giving one immediate yank upwards, causing Vega to yelp and Subject #299 to cry out in immediate pain from the sheer force of Dr. Horne's pulling.

In one swift motion, the waistband of the panties snapped around Vega's waist, while his ass had completely eaten the subject in question, wedged deep within the meaty globes of Vega's butt as they could do nothing but try to keep a hold of themself as threads struggled and failed not to snap apart. Each movement Vega made, however slight, caused a new thread to tear at the seam, with Dr. Horne walking back over to his tablet, looking down at it, and looking back up to Vega.

"You may get dressed and go about your day now." Dr. Horne instructed, with Vega nodding and moving over to his yoga pants. The subject's heartrate skyrocketed. If Dr. Horne could barely bend over with the panties on, what hope did Vega have of--

"OOP~!" As Vega quickly bent down to grab the waistband of his yoga pants, and audible SNAP echoed through the room as the bottom of the panties pulled entirely apart. Vega leapt up in shock, the subject now hanging around Vega's waist more akin to a loincloth as Vega stood there with cheeks as red as tomatos.

"Oh gosh, I'm so sorry!! I-I didn't mean to--"

"Its fine. I will fix them and we'll start the experiment again." Dr. Horne assured Vega. "And this time we'll make them the right size..."