Jeff looked at the screen in front of him with a slightly cautious eye. He could change a certain part of himself into an animal part, or partially animal part with this. Looking behind him Jeff remembered his snake. Rex was his pet boa, who was currently asleep in his tank on the other side of Jeff's room. Looking back at the program Jeff had a really strange... and arousing idea. He didn't have a girlfriend, yet he'd always been quite close to his snake. Sure it was weird... but with this program he could actually get some sex... with his snake. I was a weird idea and there was one problem. Rex was male.
Then again... there was always experiments to be had. He could set it so that he had the genitals of a female snake, which would of course mean he would have the reproductive system of one as well. It was an arousing thought and looking at the sleeping Rex Jeff made up his mind.
Typing in his changes he set it as such.
Targets Name: Jeff
DNA(s) being added: Snake (Female)
Feature: Genitals
Percent ratio: 100%
Morphing duration: 10 min
Pleasurable: Y
Alter Reality: Y
Aware: Y
Nodding his head Jeff took one last look at Rex before hitting enter. After that Jeff decided to take his clothes off. Removing his shirt, pants and underwear Jeff stood naked in his room before locking the bedroom door. Walking over to Rex's tank Jeff tapped on the glass. Rex looked up at him as Jeff spoke. "Get ready buddy. You're about to have a good time." Jeff said quietly as he looked down at his dick.
Jeff felt a pleasurable tingle grow in his dick as it became erect, Jeff groaning as he put his hands on his dick, rubbing it as it started to slowly shrink. His balls started to retreat into his body as Jeff jacked himself off, but no seed came out as inside, Jeff's sperm were turning into egg cells. After five straight minutes of jacking off Jeff's dick was little more than a nub above his crotch before it disappeared into his flesh, leaving his crotch bare as Rex seemed to be a bit more lively, flicking his tongue as Jeff smiled at his snake.
Seconds later the pleasure started up again as Jeff moaned, his crotch was starting to split open, and sideways at that. His crotch was becoming a snake's version of a vagina as a certain scent started to waft from his new genitals. Rex was active now, flicking his tongue out excitedly as Jeff smiled, sticking two fingering into his new snake vagina and rubbing, moaning with pleasure as he fell to the floor on his ass. His changes was finished, and now Jeff had a snake's vagina and he was fully aroused... as was Rex