That’s interesting about the foxes. Dogs get yipping when they get stuck. Cattle are pretty quick about things as it’s all business. You’re right about those yowling felines, a barbed penis wouldn’t be any fun. (I would say a firm 10 out of 10 females would experience pain during sex.) There seems to be few other species that are randy for the fun of it but humans certainly enjoy engaging in recreational sex compared to animals.
Always entertaining when people try to put one over on you, great anthropological smackdown!