Waiters and waitresses do it for tips. Water skiers come down harder. Welders have hotter rods. Well diggers do it in a hole. Wrestlers try not to do it on their backs.
Wrestlers know the best holds.
Writers have novel ways. Yankees do it frugally. Yellow Pages do it with Walking Fingers. Zen Buddhists do it because they don't want to do it because they want to do it. Zippermakers do it on the fly.