My response is "When ex's nick-named me 'Ouch', that's nothing to be jealous about. It's a recipe for arguments."
Money is the other thing guys get jealous about, because that comes down to pleasing women too. Don't think that my annual income means that I save more money, or have more things than him. Everyone who knows me knows that my income goes to maintaining my household, paying off my debt, and giving a big chunk to my mentally ill brother every month because he's not mentally ill enough to get SSI as far as the Feds are concerned.
My friends save more than me, they always have more money and things than me. I don't care. They rip on me about that too! Guys just treat each other like crap, and penis sizes and money are easy ways to shut them up.