A farmer walks into a bar looking frustrated and perplexed.
The bartender asks, "What's the matter?"
The farmer replies, "Well I've got these two horses and I can't tell them apart. I don't know what to do."
The bartender suggests, "Why don't you try shaving the tail of one of the horses?"
The guy says, "That sounds like a good idea, I think I'll try it. Should I do the white one or the black one?"
The bartender, obviously perplexed by the farmers stupidity, asks him to leave the bar quite simply because he ruined a joke that could have gone for a lot longer.