Getting a grip on the situation

"John. Are you ok now?" Samantha asks you from your body. "Do you understand a little better what happened now?"

You glance back at the mirror, "I, uh... I'm in your body," and then back to the familiar man in the bed, "and you're in mine."

"Yep. But don't worry, we can change back whenever we want to."

A feminine sigh escapes your lips. That was the major question buzzing around in your head. With relief you utter, "Good."

"So, are you up for a little scientific discovery? The doctor has a few experiments for us."

"It's really you in there? Like, in my body? How do I know it's you?"

"Silly, it's me. Uhmmm.... you remember years ago, that night at the club, and the alleyway afterwards?" A smile grows on his face, "The one and only time where you got to use this on me?" He pulls the sheets back and reaches down to grab your slightly swollen dick and present it to you.

Oh you remember all right. That's definitely Samantha in there. The two of you never really spoke about it afterwards, and you just wrote it off as a drunken night that went further than expected. Thoughts flash in your head of the steamy sex the two of you had, the heat of the moment, out in public, clawing at each other with abandon, fucking against the brick wall.

"Oh yeah?" Sam snaps you out of it, drawing notice to the fact that you've been staring at that cock licking your lips while you reminisce. And you notice there's this new warm tingle you feel in your groin.

"Uh." You close your mouth and shake your head, making a point to stare directly at Sam's face. "Uh, what? What was that about experiments?" Were you really just licking your lips while you stared at your own cock?

"Oh don't worry. They're all fun." And Sam gets up and jumps out of the bed.

You always knew you had a decent body, but now as his back is presented there before you, nude and in all it's fine glory. You witness this hunk of a man with well toned muscles and slightly tanned skin. You let loose a slight giggle. The butt just looks so cute, there's excellent muscle definition on his back, and those strong arms look like they could hold you forever. Wait, what are you doing? That's your body. She's in there. That's a woman in a man's skin. You're now in hers remember?

And with that you look down at those D-cup breasts on your chest. A smile grows upon your face as you're watching them rise and fall with each breath. The areolas are larger than you thought and the nipples already hard. You reach up and with a delicate hand gently brush against one. "Oh, that's nice." you think. You've tweaked your nipples before as a man but it was nothing like this. You gently rub one between thumb and forefinger and tingles shoot out in unknown directions as you sharply inhale from the unexpected response.

"Hey! I know it's lots of fun in there, but we've got work to do." Samantha stares at you, He's naked, wait. She's naked? Yeah, she's definitely a man now, one hand holding onto her massive cock. It's grown fully rigid, as she slowly rubs it back and forth in that memorable fashion. Her grip looks a little awkward. Probably due to her unfamiliarity with the new toy all men get years of practice playing with but she looks to be enjoying each stroke nonetheless. Her muscled arm pumping that long hard shaft, pulsing in her grip as you witness even from this distance the veins which run it's length. Back and forth.

She walks over to you and extends her empty hand. That's when you break the stare once again. Oh god what have you gotten yourself into? You're quite aware of this wet heat emanating from your groin.

"C'mon sexy!" She says with a grin. That face is so familiarly handsome and her smile really is nice to look at.

You take her hand, instantly aware of how much smaller yours is in this masculine grip. She guides your naked body out of bed and you're immediately thankful for her assistance as the unexpected weight upon your chest throws you off balance. This is going to take a second to learn the right posture, which after just a little overcompensating you get it down. It feels a little odd, there's this empty feeling between your legs which is new and strange. And then you notice the height difference, looking up at her feels awkward. You feel slightly uneasy now seeing this genuine size difference. You never really noticed how much bigger you were than most women but here it's painfully obvious. Yet, knowing Sam is in there leaves you feeling comforted and safe.

"Now, for the fun." She says in a deep voice, and Sam leads you towards a door in the back of the laboratory. "For Science!"