A man was walking through the grounds of a university one morning when he noticed a young blind woman struggling with her guide-Dog. The animal was resolutely pulling in one direction, she in another.
When he offered assistance, the young woman replied, “No thanks, this is a family argument. The dog knows I’m supposed to go to a lecture right now, but I want to miss it. “
This joke is included in the Black Book of Jokes. You can order it from here.