I'm currently pursuing phalloplasty, and I just realized that I could make myself permanently unable to orgasm through it.
When the surgeon builds your dick, they use tissue from your arm and hook the nerves up to your tdick. The tdick itself is buried inside the new penis and is mostly inaccessible.
I could realistically ask them not to connect the nerves. The nerves in my dick would be entirely disconnected from the rest of my body, and would probably atrophy quickly after the procedure. I would have no way to bring myself any sexual pleasure through my penis. My only option would be to try to get some sensation out of my burial, but who knows if I'll be able to cum from that through several layers of skin. I'm getting a complete vaginectomy too, so I'll only have my dick and ass to play with, and anal has never felt good for me.
I would basically be a walking dildo, ready to penetrate anyone but unable to feel any pleasure for myself.