Three Old Men

Once upon a time there were three elderly men who decided that it would be best for all of them if they moved into the same house together. They reasoned that then they could be there to assist each other in their twilight years.

One day one of them went upstairs for a bath and started running the water. As he was undressing himself he suddenly stopped and asked, "Wait a minute. Am I having a bath or did I just have one?" As he was pondering the question, the water started overflowing the tub and running down the stairs.

The second man noticed the water and decided to go upstairs to investigate. When he got about half way up the flight of stairs he also suddenly stopped and asked himself, "Am I going upstairs or coming downstairs?"As he stood there thinking about his dilemma, the bath water continued running around his feet and down the stairs.

On seeing that, the third man started to laugh and said, "Thank God I'm not like those two old fools! Knock on wood." He then followed up his statement with the customary knocking twice on the wooden table. No sooner had he done that when he too suddenly stopped and asked himself, "Was that the front door or the back door?" (unknown)