Everytime I have noticed that just click on the search bar and just type in "rate me" and read all the females asking rate me questions and the males asking rate me questions a guy will get a few responses and a woman will get on average 10-40 responses a guy on average might get 2-3 responses. And the women rate other women more than they rate guys.
So answer part 2 why do so many women rate other women on here?
We are socially bred to. Females are not only answered more often but answering wrong (read as: "5 or less") is pretty much taboo. You don't speak against women's physical appearances and you support them no matter how much you are lying.