Is it normal for a girl to lie ontop during sex?

Wow, I am totally speechless and overpowered by the feeling that I am so lucky that I am not a straight guy who has to deal with women who go to ask their girlfriends if it is right or wrong if man or woman is on top. Asking things like "what should I do with my bf?" as if there was one and only "correct" way to have sex and be ready to do what some stupid girfriends or whoever says is right - well, that's too much...