Maybe it's part of the lizard DNA. I will say from a sexual standpoint that a new, fresh partner is enough to arouse the most flaccid of men. I have a great sex life with my and were in our 50s. But there are limits - i.e. the Trifecta is 3 times in 24 hours which happens maybe once per month. But - forget the whole marriage thing - if you brought me an endless string of legal aged coeds up to early 30s, I'm pretty sure I could perform multiple times daily. It's the fresh, new thing that excites. I hope that wasn't TMI.