His excuse? The wife never paid him any attention. All her time was devoted to the kids. When he was at home she had a list of chores that needed to be done. Sadly, this does happen in lots of marriages.
His (or her) excuse (Insert a, b, or c depending on the circumstances.) I think all the different reasons I've heard around here are mostly crap. WAS want to have more fun, be with an OP, less responsibility and reality, etc. And they all come up with some reason why which generally focuses blame on the LBS so they can feel less or little guilt and personal responsibility for their (usually crappy actions).
I focused too much on my kids too Yoyo. Probably still do though not as much. And so do any good parents when they have youngish age kids. And many of us don't run out and have affairs b/c of that. And then wouldn't blame the other spouse for it!!!
