Reminds me of this one....
A man was staggering along the road at 2am on a saturday morning. A police car pulls up beside him and two police get out and stop him.
"Sir, please explain your business being out in the street at this hour, " asked one of the cops.
"I am on my way to a lecture on the effects on the human body of excess alcohol consumption and not going to bed at a reasonable hour," came the immediate reply.
The cop was naturally skeptical about the reply and asked: "And who would be giving such a lecture at this time of night?"
The man replied: "That would be my wife, when I get home."