Men don't like the sense of entitlement that women have.
Consider this: Many (if not most) men appreciate over time, at least until we're around 50. We stay relatively healthy, our maturity increases, our ability to provide security increases and our earning power generally increases.
Women (with all due respect) who do not develop professional skills run the risk of depreciating toward 50. If it's a push-up bra and high heels that landed the guy in the first place, it's unrealistic to think those attributes will continue to shine 30 years later. That doesn't mean a woman can continue to grow and reinvent herself, but many choose not to.
Now look at it from a guy's perspective: He's appreciating and she's depreciating. Then look at that against a backdrop of a woman who may complain about every little thing (i.e. "you never take me anywhere during weeknights!"). That's why we like our dogs so much. Every time you come home, good old Fido acts like your return is the greatest thing ever.