Many men are like this. Do you know how many of my parents family friends have sidechicks (my dad included), while the woman is taking care of home, the kids and balancing a job.
But the men are like...why don't you do this like you use to, why don't you do that? But they put no effort in alleviating any of the wife's responsibilities while still expecting the same 20 year old that had no husband, kids and home to take care of. I have long expected that men are very selfish, now women are becoming selfish too. It is what it is.
Before women would whine to their girlfriends about their man's extramarital affairs and try to make that woman's life hell (still true today) now many women are carrying on their own extramarital affairs too. I don't condone it, I am not saying it is right but it's the world we live in.
Women can never let go of this stuff (not saying you should).