A New Evolutionary Theory Tries To Explain The ‘Sexual Fluidity’ Of Women

A recently published evolutionary theory argues that women are genetically pre-programmed to be sexually fluid. The author purports that a woman changing her sexual identity from lesbian, to bisexual, to heterosexual and back again might have once been necessary for a society or tribe to function. According to the theory, during a more widely polygamous era, co-wives were inclined to co-mingle — thereby reducing conflict and tension amongst each other. This led to more peace in the group and, therefore, more babies. The basic point being: Happy multiple wives; more newborn lives.

Dr. Satoshi Kanazawa is the author of the theory, and this isn’t his first shot at presenting controversial ideas. This theory, he proposes, may help explain a number of anomalies in human sex research — including differences in female and male homosexuality, male arousal to lesbian sex, and menstrual synchrony.

“The theory suggests that women may not have sexual orientations in the same sense as men,” said Dr. Kanazawa. “Rather than being straight or gay, to whom women are sexually attracted may depend largely on the particular partner, their reproductive status, and other circumstances.”

Even though it sounds like something Stiffler from the American Pie movies came up with, Kanazawa is a researcher at the London School of Economics and Political Science and he devised his theory by reexamining the National Longitudinal Study of Adolescent Health. The original study measured the self-identified sexual orientation of young people in the UK.