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

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.

People in these age ranges are in fact engaged in a significant amount of sex. It should be a surprise to people in this age range but it will be to their children.

It's not a feminine thing to do so it's a sign of liberality.