It's not that men are less faithful than women, it's..
I went on one of those internet rabbit-hole journeys yesterday that started with an article about a woman who convinced her would-be lover into murdering her husband before they got together. I probably read dozens an dozens of articles of women either killing their partners, manipulating a romantic interest into killing their current partner, or hiring hitmen to kill their partner
It's not that men are less faithful than women, it's just that women tend to murder their partners before cheating, which is pretty considerate of them