A man was charged with Necrophilia (having sex with a dead woman)

A man was charged with necrophilia (having sex with a 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.