Women, is your sexual programming learned, or is it instinctive

Horniness is driven by testosterone in women, and at the moment a study is underway to measure testosterone in women from different races and cultures. It's thought that some races have more, some less, and some women suffer a decline in testosterone, and therefore a decline in libido, when in a relationship. If this is the case and early indicators are that it is, then it's mostly physical and not mental, and it's a trait that has evolved.