Santa's father comes home from his doctor and, though usually quite active with his grand-children, seems to make every effort to avoid them this day.
Santa notices his dad avoiding the kids and asks him why this is so.
Immediately the old man whisks his medicine prescription out of his pocket and hands it to Santa.
His father said, "Read that label. That's why!"
Santa takes the bottle and reads, "Take two pills a day. KEEP AWAY FROM CHILDREN."