A man walks into a pub in Vladivostok and orders a black coffee. Suddenly, a gorilla bursts in, grabs the coffee, washes his balls in it and storms out. Quite shocked, the man asks the waiter: 'Mister, do you know why gorilla wash balls in my coffee?' The waiter can't answer, so the man demands to see the manager who has no explanation either, but tells him to talk to the band playing the joint as they have experience in such matters. So the man asks the band-leader: 'Mister, do you know why gorilla wash balls in my coffee?' 'No,' the musician responds, 'but if you hum a few bars, I'm sure we can play it.'
[As recounted by Jan Verwoert in 'frieze' magazine, who was told the joke by Boris Ondreicka. Verwoert wrote "It changed my life."]