The black latex from the underwear starts to creep over the rest of your body sculpting it and transforming it.
The places where the rubber has consumed feel like they are being squeezed as you seem to develop more muscle tone where ever the rubber touches. You have abs like a god once the rubber consumes them. You continue to rub your crouch, but now began playing with your new rubber parts as the black latex seems to spread. You've never felt such an orgasm like this before. Your crotch tingles and you moan out again. Your legs to tour calves are rubber and you chest has become sculpted out like some sort of Greek god. You press hard against your crotch again wishing for more of the pleasurable sensation. The rubber of your body feels amazing against anything you touch. You can't help but cry our as your self pleasuring increases.
Your feet have become rubberized, but all your toes have fused making you look like you're wearing stocking like some sort of super hero or something. You fewl the rubber creeping down your arms and up your neck.
As it invades your mouth you gasp out it feels so lovely as it coats your tongue and your teeth. You come to realize that your throat doesn't connect all the way down anymore, but you seem to be made of rubber anyway so it doesn't matter. Your arms and hands become stronger, you are the image of male perfection, despite your missing cock. Your head finishes becoming rubber and you are on midly surprised you can still see, but you are quickly distracted again with self pleasure.