The earliest example of a bar joke is Sumerian, on a tablet
dating from the early Old Babylonian Empire (c. 1894-1800
BC), and it features a dog: "A dog, having walked into an inn, did not see anything, (and so he said): 'Shall I open this (door)?'." The humor of it is probably related to the Sumer way of life and has been lost, but the
words remain.
i
cry myself to sleep every night thinking about the Sumerian tavern joke and the Sumer way of life.
Oh to be a dog born in Mesopotamia between 3500 and 3000
B.C.E