Society doesn't necessarily encourage women's pleasure and its always tied up with monogamy,, committed relationships, yada, yada, yada. Many women don't orgasm via penetrative sex, and if penetrative sex is all a man expects, its going to get complicated as he ages.

Many women enjoy cunniligus and experience orgasms with it and, yes, with penetrative sex after. One would think more men might pay attention to that. ;-)