"How about we push the random button? If we don't like it we can always undo it or try something else."
Lisa tapped her lips, then nodded. "One condition. See if you can lock it to keep us in a relationship. I want to be able to have fun with whatever it does."
It took Eric a while, but he did find an option to freeze certain aspects before randomization and did so to keep them in a relationship. "Though depending what happens that might be super awkward. But I guess we can change it right away if it's really weird. Okay. Are you ready?" When Lisa nodded Eric hit the randomize button and braced himself.
He didn't know what to expect, but he felt a tingle in his skin. As he looked down at himself he saw his normally pale skin from too much time indoors taken on a healthy sun-kissed tan complexion, the brown hairs on his arms bleaching blond and seeming to thin out. He felt himself stretching as his shirt pulled up his stomach and he quickly pulled off the garment and tossed it aside leaving him in just his shorts. The tan spread below his shirt, but he could see it pale a bit at his waistline, the little bit of chest hair he had grown in the last year faded from his chest, first turning blond then receding back into his skin.
"Wow.. this feels.. weird." Came a slightly deeper voice than Eric had expected to hear from his own mouth.
"You're telling me." The voice that responded was almost as deep. Eric looked over at Lisa. Originally just over five feet, she now was taller than Eric. She too had discarded her shirt and Eric had looked just in time to see her breasts vanishing into a chest that was becoming more muscular. She quickly pushed down her skirt, revealing panties that now hid a small bulge in front. "I think I'm becoming a guy." She said with a hint of amusement in her voice.
Eric wanted to be repulsed by the change in his girlfriend, but instead he found himself hardening in his shorts at the sight of the masculinizing Lisa. They were both putting on muscle, though Lisa was doing so much faster than Eric, where he was developing a leanly athletic physique, Lisa was beginning to swell with powerful muscles, veins rising to the surface under her skin. Her cock had finally grown big enough that it pushed down her stretched out panties, five inches of semi-flaccid cock sticking out from a bush of pubes that was turning from blond to black.
Eric pushed down his own shorts. His cock hadn't changed much. He had always been average in that department, but his dark pubes were going opposite Lisa's, turning a dark blond and losing some of their bushiness only than and a thin trail up to his navel in the middle of his tightening six pack remained of his body hair. His skin was nicely tanned all over except for a speedo shaped area around his cock. He felt something brush at his ears, and grabbed at his suddenly longer locks, moving them to in front of his face where he could glance at it. His mother had always insisted he kept his hair short, but now it was medium length, wavy and blond.
Lisa's blond hair was turning dark black and retreating into her scalp. It kept getting shorter and shorter until she was left with a cleanly shaven scalp. As if to make up for the loss, dark hair started growing in elsewhere, thick on her jaw and cheeks until she had a thick, glossy beard, and more spread along her huge pectorals and the hardened muscles of her abs. Her arms looked even thicker than Eric's new legs, and he had packed on a good amount of muscle himself, but he had the lean look of a surfer, while Lisa was quickly becoming a body builder. He wondered how old they were now. He might still pass as an older teen, but she definitely couldn't.
Her cock stood out hard and proud at an impressive eight inches. And Eric found his mouth watering as he looked at it, he was even flexing his ass as if preparing himself to take his girlfriend's new cock and ride it all the way to climax. "Shit," the thought to himself, "not only gay but a bottom. Of course, who wouldn't bottom for that monster."
Lisa was checking herself out, flexing a little and gripping her muscles in huge, thick-fingered hands. She giggled a little as she squeezed her massive pecs. Giggled! "God, Eric. This feels amazing." She still spoke like herself, though in that deep baritone vibrating from that massive chest it sounded a little strange. "And look at you, super sexy surfer boy. And that ass." Lisa licked her lips.
Eric tried to look behind himself, and grabbed one ass cheek in a hand. Round and plump, just a little firm with a nice bounce. A perfect bottom's bottom. He blushed thinking about it.
"Oh wow, so that's what that feels like. No wonder you guys can't stop playing with yourselves." Eric looked over at Lisa, shocked to find her stroking playfully at he cock.
"Maybe we should change back." Eric found himself saying as he looked at the computer. The longer he was standing there the more he wanted to go over to Lisa and help her out with her new cock. "You're obviously way older than I am, that's kind of weird, don't you think?"
"Back? Without even trying it out?" Lisa scoffed and let go of her cock. She looked at the computer. "According to this you're 25 and I'm 31, not weird at all, you just look young since you're all smooth. And it's a sexy look on you." Lisa was on him in a flash, having him backed up against the wall. Her lips were on his, the beard scratchy but welcome against his smoother skin. He could feel her thick, heavy cock pressed up against his stomach, and at that moment all he wanted was to have that thing inside of him.