A bloke walks into a public toilet where he finds two cubicles, one of which is already occupied. He enters the other one, closes the door, drops 'em and sits down.

A voice comes from the cubicle next to him:
"G'day mate, how ya goin’?"

Thinking this is a bit strange but not wanting to be rude the bloke replies:
"Ahh, yair, not too bad thanks."

There’s a pause and then he hears the voice again:
"So, what are you up to, mate?”

Again answering reluctantly, but unsure what to say, he replies
"Ahmm, well . . . just having a quick poo. How about yourself?"

He then hears the voice for the third time:
"Sorry mate, I'll have to call you back, I've got some dickhead next to me answering all my questions"