 We have more times in the day when we can't be in that mode. One of the problems is sort of how you actually measure this, because one of the worst things you can do to find out about how often people laugh is to ask them, because everybody underestimates how frequently they laugh. Everybody's laughing more than they think they do. So we've recently published a paper to measure people's different experiences of laughter. People really vary a lot in how much they think they laugh, from a lot to very little or none at all.