Prenup Or? Opinions!

My SO and I were talking about prenups last night (it was on AHS) and he started saying how he doesn't think they're a bad idea and he would consider. Well, I said I wouldn't sign one. I'm not going anywhere and if we did split, I would want nothing. I'm not the type to screw someone over or be spiteful. I told him millionaires and shit have prenups, I don't think middle class people have them. He said "I just want to save my ass in case you screw me over". Like, what the fuck? What are your views on prenups?