We were quite surprised to see such clear evidence, at least within the white population, that masturbation was correlated with being circumcised as well as engaging in oral sex and anal sex.

We were quite surprised to see such clear evidence, at least within the white population, that masturbation was correlated with being circumcised as well as engaging in oral sex and anal sex,

Often they don't even admit it to their partners. It's the old 'I've got a headache' instead of, 'I don't feel like having sex,'

In relationships based on equality, couples tend to develop sexual habits that are more in keeping with both partners' interests. Male-centered cultures where sexual behavior is more oriented toward procreation tend to discount the importance of sexual pleasure for women.

When mama's not happy, nobody's happy.

Male-centered cultures where sexual behavior is more oriented toward procreation tend to discount the importance of sexual pleasure for women.