As it is with medicine, or physics, certain laws will always apply when an action is implemented. When your doctor routinely examines you, they will often do a reflex test, and hit you with a small hammer on the knee; your leg should lunge forward. If so, then your body is merely reacting normally to this action. Our bodies are wired reactors to actions implemented. Courtship, pre-copulation, copulation, and post-copulation itself is really no different. As soon as our sexual chemicals and cranium begin to ignite, our body goes into (what I call) a Procreation Instinctive Progression. The relationships between chemicals and cranium electrons develop a procreation-like testing ground that will (in turn) create hormonal bodily reactions, and determine if (in fact) copulation will happen. - Johnny Luckett