Joke: Whose child is it

A man and his wife in court was getting a divorce. The problem was
who should get custody of the child.

The wife jumped up an said: 'Your Honor! I brought the child into the
world with pain and labor. She should be in my custody.

The Judge turns to the husband an says ' What do you have to say in
your defense?
The man sat for a while contemplating..then slowly rose. 'Your Honor!
If I put a dollar in a vending machine and a Pepsi comes
out...whose Pepsi is it..the machine's or mine?