God breathes life into Adam and tells him... "You are man, my most favored creation, because of this I am going to give you the penis, and the brain."
Adam replies..."Thank you lord, thank you so much, thank you.
God says back to him, "Don't get to excited, there's a catch."
Adam asks, "What is the catch?"
God answers, "I'm only going to give you enough blood in your body to use one of that a time."