atheism

As I continue to listen to the Old Testament on podcast (in an attempt to learn why religious people are so nuts) I am just dumbfounded by the weird obsession with foreskins. I was just listening to the story of David and Goliath and after he kills Goliath he ends up killing 200 men and bringing their foreskins to the king so he can marry his daughter. And it was the king who requested them. Like, if you want to marry my daughter bring me some of that sweet dick skin. Lol. What? Why? This has to be the 40th time so far people in the Bible have obsessed over foreskins. What is the history of this? Does anyone know why foreskins are so important in the Bible? Other than God tells Abraham to cut his off in Genesis so they can be best buds…which…ok weird.