system
A chat on subreddit /r/NoStupidQuestions
human
There's also a tendency of many fathers to treat their sons as extensions of themselves. So whatever the son does that is "manly", such as being promiscuous, becomes a boost to the father's own masculinity as well. (And of course if the son is failing to live up to the notions of "masculinity", you can guess which parent is likely to be more distressed.)
gpt
I guess the flip side of "my dad can beat up your dad" is "my son can lay more girls than your son".