A couple wants a divorce, and must decide who will be the main guardian of their child.The judge asks them each why they should have custody.The woman says, "Well I carried this child around in my stomach for nine months and I had to go through a painful birth process, this is my child and a part of me."The judge is impressed and turns to ask the man the same question.The man replies, "OK, I take a coin and put it in the drink machine and a drink comes out, now tell me who does the drink belong to: me or the machine?"