As for [the writer's male cousin] "playing for the other team" at college, ACK, that can indeed be just a phase-but for women, not men. Heterosexual and homosexual women, if legit scientific research is to be believed, "tend to become sexually aroused by both male and female erotica, and, thus, have a bisexual arousal pattern," according to the results of a 2003 study conducted at LUG-infested Northwestern University. Men, on the other hand, prefer erotica that plays exclusively to their professed sexual orientation. Which means, of course, that female sexuality is a fluid and male sexuality is a solid. Or something. And ladies? Pointing out your fluid sexuality isn't an insult. It's a compliment — hell, it's a freakin' superpower.
To conclude that women are bisexual on the basis of their sexual responding overlooks the complexity and multidimensionality of female sexuality.