Study show Chinese women can't orgasm unless partner is rich.

http://pleion.blogspot.com/2009/01/wealthy-mens-women-have-more-orgasms.html

http://2.bp.blogspot.com/_XJHB6bRQ4Cg/SXNoiQZjHiI/AAAAAAAAARI/gfM6AZ9usdU/s1600-h/pollet01.png

MY theory is:

western women : pretty boys
asian women : rich men (although you cant be UGLY)