You stare at your girlfriend, unsure at what she had in mind.
"Any hints?" you ask.
"Well, I know that you're bisexual so i thought I'd turn into a man, I found a cute guy on instagram who I think you'll enjoy." She says as she walks towards you, resting her hands on your thighs as she gives you a quick kiss before stepping back.
"Oops, don't wanna ruin this shirt." She lifts her tight white tee over her head, revealing her taut, E-cup breasts. She throws you a wink as she tosses the shirt at your face.
"Oh! here we go hnnngggh!" She grunts as she backs up, leaning against the dresser. You watch as her waist widens and her hips begin crunching inwards, losing that hourglass figure you're so fond of. Her shoulders begins to widen and build up muscle and her hands increase in size.
"Ohhhhh this feels *Mmmmmffft* Unnngh, Sooo goood!" Your girlfriend moans as her voice changes from soft and womanly to deep and masculine as an adams apple emerges from her throat. You'd be lying if you said this wasn't turning you on, your tenting erection says it all.
Next your girlfriends slender arms bulk up with muscle and fat, leaving her with slightly chubby man arms, she flexes her biceps, grinning at her impressive muscles as she throws you another wink. Her hair begins to recede into her scalp, leaving her with a cute pixie cut.
The hair lost from her head reappears around her body, giving her a hairy chest, arms and legs. Her eyebrows thicken and her jaw cracks as her facial structure shifts from that of a beautiful woman to a handsome man. Her lips shrink slightly but largely remain plump, just the way you like it. Next she turns around for you, showing off her large butt in her booty shorts. She gives herself a slap on the ass and giggles in her new deep voice as her ass shrinks slightly as the fat turns to muscle, next her soft thighs also begin to bulk up, giving her strong, hairy quads and calves you would expect from an athlete. She turns back around to face you as she closes her eyes and grunts in pain and pleasure. "Hnnnnnngghh, Mmmmmff-fuck" She says as a large bulge begins tenting in her shorts, growing into an impressive 7 inch penis, next her ovaries invert and drop into large testicles. Finally your girlfriend is now a man, but there's one last step.
"squeeze them for me" He says as he approaches you, gesturing to his large E-cup breasts, you massage them with your hands, loving the sensation of your new boyfriends hairy tits, he moans deeply as you tweak his nipples, his cock peeking out from the top of his shorts as you give him his first erection. finally you feel his chest hardening, his breasts shrinking as the matter becomes more muscle which develops over his torso, leaving him with tight, rock-hard pecs and an impressive 6-pack. Finally his skin darkens in tone slightly and looses it's feminine softness. Your gorgeous 5"6 girlfriend is now a hunky 5"10 man. You grab his muscular bubble butt as you pull him in for a kiss, tongue in tongue as you work your hands over each others hard bodies, erections pressing against each other.
"Wow babe, you look so hot like this" You say as you touch his hunky body, giving his balls a squeeze.
"I feel amazing like this, I feel so strong bab. So, what do you wanna do now??" he says sensually in a newly-found latin accent.