Four guys are playing poker having a great time except they were constantly being pestered by the host's young son. Finally, one guest took the young lad out of the room for a few minutes. The entire rest of evening, the four played poker without interruption from the young boy.
As they were leaving, the father stopped Fred and asked, "So how did you keep junior busy the rest of the night?"
"Oh it was simple," replied Fred, "I taught him how to jerk off!"