FAMILY DINNER

During a dinner party, the hosts' two little children entered the dinning room totally nude and walked slowly around the table. The parents were so embarrassed that they pretended nothing was happening and kept he conversation going. The guests cooperated and also continued as if nothing extraordinary was happening.
After going all the way around the room, the children left, and there was a moment of silence at the table, during which one child was heard to say, "You see, it is vanishing cream!"