"H-how are you gonna follow that up?" you pant, smiling satisfied.
"Oh, you'll see," the male nurse grins knowingly. You don't see yet, but whatever they've injected you with (combined with the effects of The Tube) have made your body very suggestive. All you want right now is to feel pleasure- men, women, anything to make your body feel good.
The two nurses pull off your T shirt before putting on surgical gloves and starting to touch your nipples. You pant as the soft, cold material brushes against them and makes them turn erect. You haven't ever really been into having your nipples played with, but it feels amazing. They're suddenly really sensitive, and you slowly notice they seem to be growing as the hands tease them more. Once the nurses stop rubbing them, they look noticeably bigger and more feminine, and feel much more sensitive to the touch. Next, the nurses both put their mouths to the nipples and lick them, making you whimper loudly, and start to suck them, making you moan. It feels indescribable, and as they continue sucking, licking and teething your nipples, your chest grows before your eyes, swelling more with each breath until you have C-cup boobs on your chest. They finally let you go, and you feel your new breasts ache with pleasure.
You faintly notice how other parts of your body have changed as they've been making your boobs form; your muscles are slimmer, your hair has lengthened on your head and vanished on most of the rest of your body, your skin is softer and your body is thinner and more curvaceous. Besides the still-hard cock between your legs, you almost look totally like a woman.
They've clearly thought of that, because the next thing they do is position The Shaft. It gently rubs against your scrotum, and you feel an aching inside you. Your hips respond just as they did to The Tube, thrusting you towards it and letting The Shaft rub along your scrotum. Slowly, your body and mind start to change in response to The Shaft. It thrusts particularly harshly at you and you grunt in a high-pitched voice as your balls move up inside you, your nutsack starting to reshape into a feminine slit. You peer over your boobs to see your penis shrink, and paradoxically feel more sensitive, as it slowly reforms into a clitoris. The Shaft finally pushes inside you as your vagina opens, and you feel the empty ache inside you subside, replaced by a spreading warmth. Your cock rapidly shrinks and settles into a small feminine nub, and your hips thrust against The Shaft eagerly, feeling it rub against the sensitive new spots inside you, until you finally cum, clenching hard around The Shaft as you orgasm for the first time as a woman.
You slowly come down from the high as The Shaft pulls out of you, and pant satisfied as you lie there, having experienced more pleasure just now than in your entire life.