One Day God came to Adam and said "Adam, I have two gifts for you. There is a catch though."
Adam replies, "Great God what are the gifts?"
To which, God said, "First I am giving you a brain..."
Adam asks, "What's that?"
God continues, "It will let you out think all the other creatures on the planet and let you become master of this world I have made for you."
Adam thinks, "Wow! This is great... what's the other gift?"
God answers, "I am also giving you a penis. With this penis you can copulate with your wife Eve and have babies. These babies will take care of you when you get old and will take over and spread through the world."Adam is overjoyed... but, "What's the catch God?"
God says, "Well Adam, I only gave you enough blood to use one of these organs at a time."