A Two Ronnies one from the Guardian:

Two men in the pub.

Ronnie 1: Well how have you been, Fred?

Ronnie 2: Not too good Bert. I was riding my bike and slipped off the saddle and hit the bar on my, you know, down there...

Ronnie 1: Rectum?

Ronnie 2: Well it didn't do 'em any good...