In Sweden, where nudism is a general practice, the suicide rate is
alarmingly high. Nudism may be a contributing factor. It's not unlikely
that a potential suicide gets very depressed comparing himself with some of
the others.
On the other hand, I'd expect nudists to be a happy group. There are some
people I know who would be good for a laugh if you saw them with their
clothes off.
-- Selma Diamond