"a man walks into a bar" joke
A man walks into a pub in ireland and orders three pints of guiness. The bartender gives them to him and the man walks to the back of the bar and sips on each of them. When he is finished the man walks up and orders three more. This time the bartender asks why he doesn't just order one at a time. The man explains that he has a brother in the US and in Australia and when they left home they agreed to each drink like this to remember when they used to get boozed up together. The bartender agrees this is a nice custom and pours three more pints. The man returns to the bar night after night and soon becomes a regular. One night he goes up to the bar and only orders two pints. All of the other regulars and the bartender stop drinking and express their concern for his loss. The man then explains "oh no, everyone's fine I just quit drinking!"
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