You were drinking away at the strange elixir you found in the room, but when your body began to tingle, and a strange pressure came from your loins, you suddenly put down the drink and hold your sides. "What the...?" The mild pains subside, and the tingling fades, but the pressure is still there. However, just as you go reach down to your skirt to look under it, the pressure releases suddenly, and you find a new alien body part thrusting out in front of you, tenting your panties and skirt forward.
Sheepishly, you lift the hem of your skirt to see your tented underwear, and within, a fully erect 10" long very male penis throbbing before you!! "No... No way..." You reach down and grab it, and feel yourself touch it, both through your hand, and your hand touching "it." Worried about your female parts, you take your other hand and reach below, worried you'd find testicles, but sigh in relief when all you find is your feminine opening. Even your clit was still there, but now it was like a spur jutting from the point where penis and vagina meet.
Thing was, all this examining yourself was starting to feel good. Before you know it, you're stroking and fingering yourself. Never before have you felt so wonderful. As you begin to feel your climax building in both your male and female parts, you are amazed how great male genitals feel, saying, "No wonder they think with these things!!"
Finally, you come from both genitalia simultaneously, and nearly pass out from experiencing the power of the male climax combined with the female ability to orgasm multiple times. "Oh wow... That was... That was, something else." You see your right hand, coated in a mix of both your male and female cum, and lick a bit of it, tasting it out curiosity. It had an odd salty, but arousing taste. You practically got hard and ready again just from the flavor. "Should I?" you wonder, questioning if you go for round two, but decide not to, taking some wipes from your purse to clean yourself off.
Once done, you leave the room. On the bottle, in fine print, was a warning, saying, "Effects of Y Brew potentially contagious within 72 hours of drinking. Avoid sharing bodily fluids or sexual intercourse of any kind with another person during this time or they will be transformed like you... unless you like that kind of thing..."
Out of the room, you look around and...