A guy goes to the doctor and says he wants to be castrated. "Castrated?" says the doctor, "Are you sure that's what you want?" "Yeah," says the guy, "I've heard it's the cleanest way to be." "OK," says the doctor, "I can fit you in in a week". So the guy goes back a week later and has the operation, which goes smoothly and successfully. When he's leaving post-op to go home, he's wheeled past a woman booking an appointment for her son. "I'd like to book a circumcision for my boy", she says. The guy goes "Circumcision! That's the word I was looking for last week..."