A construction worker walks into a bar. He's a rather large, menacing guy. He orders a beer, chugs it back, and then bellows, "All you guys on this side of the bar are cocksuckers!"
A sudden silence descends. After a moment, he asks, "Anyone got a problem with that?" The silence lengthens. He then chugs back another beer and growls, "And all you guys on this side of the bar are motherfuckers!" Once again, the bar is silent. He looks around belligerently and roars, "Anyone got a problem with that?"
A lone man gets up from his stool unsteadily and starts to walk towards the man. The construction worker looks the man square in the eye and says, "You got a problem, buddy?"
"Oh no," insists the man. "I'm just on the wrong side of the bar."