I love it, a non PC joke for a change
As Mr.Burns would say
"excellent"
Full credit here goes to Bazza
I was caught short while shopping with my missus last weekend and had to go to the toilets in the shopping centre for a poop.
Just as I sat down, the guy in the cubicle next door said, "Hello".
Out of instinct I said "Hello" back.
"What are you doing?" he said
Panicking a bit by now, I responded: "Having a poo. You?"
To which he said: "Sorry, mate, I'll have to call you back. The knob in the cubicle next door is trying to talk to me".