Great jokes are timeless and worth repeating.

My Dad remembered every joke he ever heard, and some of them, despite their age, were quite hilarious. Here's one:

An old bachelor said, "I could have married any girl I pleased!"
To which an observer commented, "Obviously, he never pleased any girl."

And speaking of old bachelor jokes, this one goes back centuries:
An old bachelor had been seeing a widow for many years.
Finally, she asked him why he wouldn't marry her.
He said, "If I did, I wouldn't have anywhere to go in the evening."

You can't beat the classics.