Crying from Happiness

Mr. D watched the tail end of the US Open (men's golf) with Tama today, and was quite surprised to see the winner crying. "What happened, Tama?" he kept asking. "Why is that man crying?" Tama talked about strong emotions and crying from happiness as well as sadness, and Mr. D took it all in. Tonight, as I was singing him some extra "special request" lullabyes, he scrunched up his face a little and asked, "Do you know what I'm doing?" "No, what?" I asked. "I'm crying from so much happiness," he responded with pride.