It got a little long-winded at times, but it was interesting. I don't see any of this as suprise, and it is all really based on the point of Survival; after all, that is the meaning of life. Every creature on this planet is just trying to ensure their own survival, their family's/herd's/flock's/polygamous grouping's survival, and finally their species' survival.
It is no secret nor a lie that men are sex/force driven; women are too. It may consciously be a pleasure thing, but in reality it is all about offspring, because that is the best way to ensure survival. Protecting yourself from predators and the elements is a short-term objective, you as an individual have to die sometime. Offspring ensures the species carries on. As much as people don't want to admit it, we are animals.