In English, it’s quite popular to talk about another person’s mother. And there are especially two insults regarding mothers, that I want to talk about.
The first one is “son of a bitch”. This is used to insult not the mother, but the son, which doesn’t really make sense, given that the son is merely being mentioned, but not with offending terms. In my opinion, it’s like insulting one’s sister — okay, insult, but why not say something about me?
The other one is “motherfucker”. There is no doubt who this is directed at, but I’m questioning the insulting effect in this. Given that there seems to be a sort of achievement in doing another one’s mother, I don’t see how “motherfucker” can be insulting. Plus, all fathers in the world are per def motherfuckers?