A boy and his grandfather

One day a little boy sees his grandfather sitting in his chair, drinking a beer. The boy runs up to his grandfather and sits in his lap. The boy asks his grandfather of he can have a sip of his beer. The grandfather said it depended on one thing. The grandfather said if your dick touches your asshole, then you can have a sip of my beer. The boy assured his grandfather that he was not that lucky. The grandfather said, "Well, you can't have a sip of my beer, then".

The next day he sees his grandfather in the chair puffing on a cigar, the boy runs up to his grandfather and sits in his lap. The boy asked if he could have a puff of his grandfather's cigar. The grandfather again asked if the boy's dick touched his asshole. The boy assured him again that it does not.

The next day the grandfather walked out onto the front porch where his grandson was eating some cookies. The grandfather told him the cookies smelled good. He asked his grandson if he could have one, too. So, the boy looks up at his grandfather and asks him if his dick touches his asshole. The grandfather exclaimed that his dick did in fact touch his asshole. The boy then replied to his grandfather, " Well then, go fuck yourself ".