What is the word for a cheating husband in terms of the mistress?

Question by roomie: What is the word for a cheating husband in terms of the mistress?
When a guy cheats on his wife, the girl he does it with is called his mistress; what is the guy to the mistress? Do you know what I mean?

Best answer:

Answer by Julius
“Automated masturbation device”.

What do you think? Answer below!