NewJourney:

I think what also is going on is that when women talk about getting in the mood, getting the right mindset, what they are really doing is trying to arouse themselves and then HOPE that desire shows up. Testosterone causes desire without having to be arroused. Testosterone cause desire WITHOUT having to have a REASON for it. And one of the keys to marriage is being able to desire your spouse when they DON'T earn it.