I remember once, I was with the boys and a girl who used to date a friend
We were talking about the usual (Spanish civil war, Napoleon's marshalls, the Croatian struggle, Christian virtues, football, etc) and she stops us and says: "Wait, is THIS what you talk about? Not girls?"
Of course, they are going to defend their shallow and superficial friendships when all they do is talk about girls, sex, money, sports and cars.