It’s night and a drunk is crawling along the pavement looking for something.
A passer-by offers to help and asks what’s missing.
The drunk replies that he’s lost his watch.
‘And where did you lose it?’ asks the passer-by.
‘About half a mile up the road,’ replies the drunk.
‘So why are you down here?’ asks the passer-by.
The drunk replies, ‘Down here the lighting is better.’
This joke is included in the Black Book of Jokes. You can order it from here.