When I was young, I was playing at the
park near my house, when a stray ball from someone's game of
Horse suddenly rolled my way.
I complied with the shouted command; got bored and went home. Later that night,
I decided to ask my father what a sphincter was. He asked me
why I wanted to know, so I told him...
and then he laughed, and I laughed, and we laughed together for a long time.
I never did find out what that boy had meant.