You run into the girl's room. Pretty soon you wont have genitals to masturbate with, so you better make this count.
You look up some hentai on your phone. Such beautiful bodies, if only you could be like them. You start rubbing your pussy as fast as you can, you don't have much time.
Pretty soon you wont be able to do this. You'll be completely sexless. No more masturbation, no more orgasms, you have to make this one count.
After a few minutes of rubbing your clit you reach climax. It feels good but you begin to cry afterwards. That was your last orgsam, ever, or at least while you're in school. All those warn feelings between your legs are soon to fade. You understand why they do it, that they have to, but still you're going to miss genitals.
You pull your pants up and walk into a surgical room and are asked to undress. The doctors can see your vagina, they poke at it a bit then ask you to lie down and spread your legs. A mask is placed on your face and you pass out.