Growing old?
Three old boys in the pub, one says "I dunno, I keep having to nip to the loo every hour - its a right nuisance".
The other says: "Well I don't have your problem, I'm just the opposite - sometimes that's three days between visits".
The third says: "Well I don't have your troubles - I'm regular as clockwork, half past six every morning".
The other two look on enviously until the third adds: "My problem is, I don't wake up until 7".