Contemplating his changes Jeff suddenly had a thought. Did he need to use an inanimate object? He could actually give himself something different, like a part of an animal or something. Looking down at his pants Jeff realized his penis was tenting it at the thought. He was getting aroused by this line of thinking. And already he had an idea. He'd always liked cows for some reason. And despite his maleness, he didn't really care about it. Here he had a chance to experience so,etching much different to being male, having a cow's udder.
Looking at the chronovac Jeff set the changes, his penis and male equipment would be replaced with a Cow's udder, technically leaving him genderless. But that wasn't important as he set the change to take a few minutes before he hit confirm and stripped off his clothing.
Standing naked in his room Jeff cradled his erect dick, smiling in the mirror as he pointed it out. It was pretty big for his age, but soon it wouldn't be his. Putting his hands on his dick he felt something different, the skin was getting softer. With a smile Jeff squished his softer dick, moaning in pleasure at that little joy as his erect dick lost it's erectness. It was now just a soft dick. And Jeff watched as it started to turn pink, or rather pinker than his normal white skin tone, the base of it starting to fatten as it turned entirely pink.
Jeff was forced to spread his legs a bit as his dick grew in size, rounding out into a massive ball of soft pink flesh hanging from his crotch between his legs. It was actually attached from his crotch to just before his asshole, but minor details. He'd entirely lost his dick at this point as he put his hands on his new organ and gave it a squish, moaning in pleasure as four points on the ball of pink flesh grew out into teats, a strange substance starting to flow into his new sack as Jeff grabbed one of his teats and gave an experimental pull.
As soon as he did a white liquid sprayed out of his teat, Jeff getting to his knees and moaning in pleasure as he looked at his mirror, which had some of the liquid on it. Putting his finger to the liquid he raised it to his mouth and gave it a taste. Milk. He was producing milk!
Slowly standing up Jeff looked at himself in the mirror. Now a boy with a cow's udder between his legs and a smirk on his face.