God walks up to Adam in the garden of Eden and says "Adam, I've got some good news and some bad news"
Adam replies "Oh shoot, here we go again"
God says "Shut up and listen. As of today I am giving you two new organs.
One goes between your legs and is called a penis. Eve will love it, It'll be handy at picnics and you will have a brand new toy.
The other organ is a brain, this one goes in your head and you will be able to make logical, rational and well planned decisions with it".
Adam can't believe it and asks God "Okay, so what's the bad news?"
God replies "I can only give you enough blood to make one work at a time"