I know that a certain percentage of straight males have foot fetishes, where they feel sexually aroused by girl's feet. But I've also observed that there is a similar phenomenon in girls, where they feel aroused by guy's hands. Some say they like big strong looking hands, while others, like this girl I dated a few years ago in my high school, say they like refined gracile looking hands with long fingers, like a piano player. Does anyone know why this phenomenon exists? It's too common to just be a fetish, there has to be an evolutionary biological reason. What are your ideas on this?