People are most comfortable of hanging out with their alikes.
I think it is part of human nature.
Asian Girls are more accepted than Asian men in America.
Female gender posts less threat than male gender. Men in general seeks control and power. More females joining another group different from their own means more sex with males of the other group, males have no problem with that. But males would have a problem with males from other group take control of the females in their own group if it happens on a grand scale.
