>If your daughter looks at you and says you have ketchup on your mouth and points to the left side of her mouth- do you wipe your left or right side?
>
>(Yeah, I know, you don't eat ketchup - but it's all perspective, dude!)

Her left is my right. We have long ago established the custom to show it as in a mirror.

For other people, I do the same but try to point to the correct side with the other hand.