Everyone buys one present for $20. You put all the presents together. Then each person gets a number. Number one picks a present and unwraps it. Then number 2 either steals number 1's present or picks one from the pile. If number 1'a present is stolen, then they get to unwrap another present. A present can only be stolen three times then it stays.
It's just a fun way to exchange presents.
Now if you want our own dirty Christmas I think we can manage that.