In one chapter, the main character's ex-girlfriend is dating an agent/manager who is trying to convince the parents of a young man, that the boy should be castrated, to maintain his beautiful young singing voice.
The ex-girlfriend is offended at the request at takes the boy into the back room and screws him.
The boy comes rushing out and pops the agent/manager in the mouth.
The implication is that she was showing the boy what he might miss out on if castrated.
Happens to me all the time.