"C'mon." Your girlfriend stomped her feet with childish anxiety, you couldn't help but blush as her tiny breasts jiggled ever so slightly as she placed her hands on her hips in frustration. "Are you going to choose or..." A devilish smile crossed her face.
"Or what?" You ask, taken aback, you have seen that smile before, it's when she gets a idea in her head and there really is no stopping her.
She twirled around to emphasize her smaller body. "I can start screaming as loud as I can, what do you think would happen if someone came in here and found you with a nude kid?" She asked as the blood drained from your face, she wouldn't dare, but were you willing to risk it?
"Fine." You hang your head in defeat.
She skips away, coming back a few minutes later with a skin suit, you can't see what she has in her hands as she has it bundled up and close to her chest. "Close your eyes." She commands. "I want it to be a surprise."
You take a deep breath and do so, kicking off your shoes you close your eyes. You can feel her small hands take off your socks, followed by unbuckling your shorts and stripping your underwear. She takes your left leg and gives your foot a kiss with her tiny mouth, eliciting a small moan as she runs her tongue up the length of your foot before slipping it into the skin suit. You can feel the warmth of the new skin, you thought maybe it would feel cold like a costume but instead it feels warm and pleasant to the touch.
She moves to your right foot, repeating the soft kisses and licks as she places your foot inside and slowly slides the suit up your legs. "Bye bye, I am going to miss this." She kisses your dick, her tiny tongue dancing over it, you feel massive in her tiny mouth as she pulls away and pulls the skin suit over your crotch, you can only let out a small moan and struggle to keep your eyes closed.
"Almost done." She hums, licking at your nipples before raising the suit over your chest, she takes your hand and slips each of your arms in, your chest doesn't feel different so you hope that means she choose a male costume. "Now comes the final part." She explains, placing the mask over your face, for a moment it feels hollow inside, and then the mask slowly begins to collapse, sticking to your face, and then pressing closer and closer. You gasp and suddenly there is no mask.
"What?" You ask, your voice cracks as you open your eyes to find yourself at the same height as her, if not a few inches shorter. She stands there looking proud of herself but her eyes are focused on your crotch. You follow down, matching her gaze to see your small uncircumsized penis hanging limply between your legs, maybe a few sparce hairs seem to be growing above it. You examine your lanky arms for a moment before looking back at her in embarrassment. "Well? Are you happy now?"
"I'm getting there." She licks her lips.