A guy walks into a bar with a monkey on his shoulder. The bartender states that no pets aren't allowed in the bar. The guy assures the bartender that the monkey will be no problems.
A little while later the monkey jumps off the guys shoulder, runs across the floor, jumps on the pool table and eats the cue ball.
The bartender is furious, but the guy calms him down, by explaining that he will return the cue ball after he craps it out.
The next day the guy returns, and hands the shiny clean cue ball to the bartender. The bartender eyes the monkey suspiciously but says nothing.
After the guy has had a couple beers, the monkey jumps from his shoulder, runs across the bar, grabs a peanut, shoves it up his butt and eats it.
"Now what is you monkey doing?!", the bartender exclaims.
The guy replies,"Ever since the cue ball, the monkey likes to test things out, before he eats them."