For guys in relationships, how much do you think getting your “dream body” would change your wife or girlfriend’s attraction to you?

Just something that came up while talking with some workout friends. We all have some kind of physical "looks" goal in mind, but we're also all married, and many of us have kids. The question came up whether actually reaching those goals would change anything in our relationships, particularly how attracted our partners are to us. Curious how other guys think about it.