It's called getting old and becoming complacent. That's what happens when you hit your mid-late 30's and are still married.
I got married when I was 29 and still had hot young women offering up the booty. When I first got married girls came out of the woodwork. Something about that ring. Never strayed though. My wife was a smokin hot piece of @$$. Still is pretty hot at 36 after 2 kids. She's a great mom, a decent cook, and she rarely gives me Schmitt about anything. That's why I'm still married. Some of my friends' wives are freakin twatwaffles. No way man. I'd be out of there. Living at an apartment complex with JSP and Kirk Van Houten.