There were 3 old men, Harry, Bert and Charley, waiting to see the specialist at the local hospital, so they strike up a conversation.
Harry says to Bert "why are you here?"
Bert replies "I cant p*ss, i stand there for 15 minutes and only a small trickle comes out and its painful! why are you here?"
Harry replies "I cant sh*t i sit there for half an hour and only get the size of a marble out!"
They both turn to Charley and Burt asks him "so can't you p*iss either?"
"On the contrary" says Charley "every morning exactly 6.30am i p*iss enough to fill a litre bottle of pop!"
"So cant you sh*t either?" asks Harry "On the contrary every morning exactly 6.45am i sh*t enough to fill a shoe box!"
"So why are you here??" they both ask in unison
"I dont wake up till 7am!!!!"