lol. I have a habit of sitting in un ladylike positions, I don't see the point since I wear pants all the time. but when I went to the UK all my flat mates were constantly reaching over and closing my legs and telling me to cross them. if it's not for the sake of comfort, girls cross their legs for the sake of being modest. I'll bet it's almost bred into us since for ages women had to wear skirts and dresses.