Laughter is the best medicine.
My uncle first showed me this cartoon when I was at his house for Xmas. I thought, "What funny timing? Is this a sign"? I recently went thru a couple of situations where someone I know kept insisting that I acknowledge her whenever she said hello to me. We don't like each other and she kept playing this game to see if she could annoy me. And when I didn't say hello back she would throw tantrums. Luckily the last time we met she didnt even acknolwedge me which is exactly what I wanted. So, anyhoo, I found this on the New Yorker site. That reminds me check this site out. If you like NYer cartoons you'll be sure to like this.