"Women's sex drive peaks at a later age than men's sex drive. "
This is absolutely wrong. You are half reading the research, women experience a spike in sex drive just before menepause, then it falls off the cliff.
http://www.time.com/time/health/article/0,8599,2002838,00.html
"By contrast, men's sexual interest and output, usually measured by a reported number of orgasms per week, peaks in the teen years and then settles to a steady level (an average of three orgasms per week) for most of their lives. As I pointed out in March, most men remain sexually active into their 70s. According to the new study, as well as the study I wrote about in March, women's sexual ardor declines precipitously after menopause. Why would women be more sexually active in their middle years than in their teens and 20s? Buss and his students say evolution has encouraged women to be more sexually active as their fertility begins to decline and as menopause approaches."
David Buss, mentioned in the article, is a leading force in evolutionary psychology. His (along with Cindy Meston) "Why women have sex" and Roy Baumeister's "What Good Are Men" should be required reading in gender studies classes, but they won't be.
"because their partners stop taking the time to do the things that satisfy them"
In this case, as in most cases, the reasoning brain is post hoc rationalization of subterranean unconscious causes. It is well-documented that both menopause and childbirth have deliterious effects on women's sex drive, for obvious evolutionary reasons.
Stop paying attention to feminist scholars that go beyond equality for individuals and instead see patriarchy hiding under every bed and in every closet and acquaint yourself with evolutionary psychology - cruel nature, so long as men have infinite sperm and little cost to reproduction and women have only 300 eggs and huge time cost for reproduction, will enforce inequality.