A big bulky man covered in filth and dirt walked into a bar and started to insult everyone.
He smashed the bottles and drank like a wild man. Soon everyone had left the bar in disgust.
Except for an old man, who just watched the wild man with interest.
So the wild man walked over to him and said,
“Hey Old Man! What the hell are you staring at?”
“Well, many years ago I was arrested for making love to a buffalo. And I just had a feeling, that maybe you are my son!”