One day a little boy walked in on his parents doing it and asked what they were doing. The parents' reply was that they were making fish sticks. So the little boy left it at that.

A few nights later the little boy walks in on them again, and this time he asks, "Are you making fish sticks again?" The parents both reply yes.

The boy remarks, "Well, mom, you have a little tartar sauce¹ on your mouth.