Man was charged with Necrophilia (having sex witha dead woman)

A man was charged with Necrophilia (having sex witha dead woman). The judge said; I havn't seen such disgusting case in 20 years. Can you give me one good reason why you did it?
Man: I can give 3 reasons.It' non of ur business, she was my wife and I didn't know she was dead as she always acted like that.