Now when a dude rants about how he can't find any interested women, he'll at least have science to back up his claim. Well, if you believe that every study is infallible, anyway, and you don't consider things like "looks" and "personality."
A recent study conducted by Dr. Gerulf Rieger of the Department of Psychology at the University of Essex suggests that women are never totally straight, but instead either lesbian or bisexual. The study tested women of varying sexual preferences by showing them videos of naked men and women, then monitoring both their genital arousal and pupil dilation. The results showed 82% of the women involved were attracted to both sexes, while 74% of the women who identified as straight were aroused by both males and females. Notably, however, those who identified as lesbians did have a stronger response to females than males.