Jeff scrolls through the animal options.
"I'm not sure what animal I want to become, but I think I should get the basics down."
Jeff set the radius of transformation for 3feet, just enough to scan him. He typed in 'mental change ' so he had the experience of a horses mind while being fully human minded.. Finally, he set the hornyness factor to 100% for the full effect. He saved the changes and returned to the animal selection screen. Jeff's friend snuck up behind him, grabbed his shoulders, and yelled, "BOO!" Scaring Jeff. Jeff's finger slipped and hit the 'Horse' option. The chronovac scanned both Jeff and his friend and teleported them to a field, where it readied their transformation.
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Jeff and his friend stripped naked, and had a strange urge to do... Something strange. Jeff stood straight up, with his arms in front of him clutching his 'parts'. Jeff friend bent over and stuck his face in Jeff's butt, while grabbing Jeff's hips. His face merged with Jeff's butt, and Jeff's arms fused to the frond of his body and groin, erasing his 'parts' altogether. Jeff felt his spinal chord connect with his friend's spinal chord, and he immediately felt a pain at his friend's butt as a tail grew right above his anus. Jeff and his friend's feet shifted, so that only the balls of their feet touched the ground. Their toes fused and hardened into grey hooves. Jeff's friend's body expanded, as well as Jeff's lower body, and their legs, becoming the size of a large horse. Jeff's body leaned forward a bit and grew a bit wider and a lot longer (not taller), matching the width of a horses neck. Jeff's eyes shifted to the sides of his head as his ears shifted to the top of his cranium. He looked forward and saw his vision go blurry as his whole face pushed out in front of him, creating an equine mussle. Jeff's tail swished around as it gained dark grey hair, and his whole body covered in a white horse hair as his ears pointed and stretched upward. Jeff felt horny, however it was the least horny anyone could be while being erect, as a huge horse had the manparts of a human. This soon changed as jeff's friend's balls, now his balls, gurgled and churned as they expanded to the size of watermelons and turned dark grey. His Phalus expanded in width and lengthened, to 6inches thick, and 4 feet long, growing pink and dark grey spots. Jeff's new horse penis tensed and orgasmed a jetstream about 10 feet long of cum. Through this he forgot all knowledge about the chronovac, forgot about his past life, and even forgot about what his friend had become.
His friend was now basically a penis and a butt. That is all.