Rob

“Trout did another thing which some people might have considered eccentric: he called mirrors leaks. It amused him to pretend that mirrors were holes between two universes.
If he saw a child near a mirror, he might wag his finger at a child warningly, and say with great solemnity, "Don't get too near that leak. You wouldent want to wind up in the other universe, would you?"
Sometimes somebody would say in his presence, "Excuse me, I have to take a leak." This was a way of saying that the speaker intended to drain liquid wastes from his body through a valve in his lower abdomen.
And trout would reply waggishly, "where I come from, that means you're about to steal a mirror."
And so on”
― Kurt Vonnegut