A couple get a divorce and are in negotiations for the custody of their children. The judge ask each of them to defend their reasoning for their rights to sole custody.

The wife reply "the children are really mine, i carried them for nine months and spent in hours for birthing them. He really didn't do anything The judges nod thoughtfully, recognising the validity of her reasoning and asks for the husband defense.

The husband thinks for a minute and replies, " Your honor, if you put a dollar into a coke vendor machine, and coke pops out. Does the coke belongs to you or the machine?"