Years ago, some heckler at a gig I wasm yelled, "Hey, man. If I slept with your wife while you were out at a gig and she got pregnant, would that make us related?" I go, "I don't know, but it'd sure make us even!"
When I'm waiting for the bus I hat it when someone asks "Has the bus come yet?" ...... Hey dummy .... If the bus came, would I still be standing here???