Nullification is a catchall term for removing any part of the body. As well as permanent removal there is also temporary nullification play, which covers things like dropping things in casts, taping and gluing things up, wearing chastity devices, pushing things up inside the body.

Some people take the scrotum and glue it up over their genitals to close everything up for a while or wear mechanical devices to make masturbation or even erection almost impossible. It’s basically disabling any part of your body for use.

When it comes to permanent removal, people take off pretty much anything. Some people remove their navels or their nipples.