The post you are reporting:
A man went into a public toilet, found an empty cubicle and settled down. As he sat there, a voice from the next cubicle called out, "Hi, how's it going?"
Not wishing to be rude, he replied, "Not too bad, thanks".
A few seconds later, the voice asked, "What are you up to ?".
Somewhat reluctantly, he replied, "Going to the loo".
Then he heard the voice again. "Hold on, I'm going to have to call you back. There's some idiot in the next cubicle butting in !"