what is this thing called happiness?

In Russian we were going around saying "Happiness is...[something]" and then the person next to us would agree or disagree before giving their own version of happiness. It was the first time I was called on, and I said "Happiness is when you have a cat." Which was moderately well received by the class. But the person next to me was hilarious when he accidentally said "I disagree--happiness is when you have some napkins." I don't know what he was actually trying to say, but I keep laughing about it.