This video contends that there is no such thing as an unintended pun. I take exception to that. Sometimes I write something and in hindsight I realize that I made a funny. In such cases adding “no pun intended” is a valid observation.
Of course there are instances where I deliberately tailor my choice of words for comedic effect in which case I might add “pun intended.” One last point, I resent having my humor dismissed as puns, I prefer to call it a ‘play on words’.
Got that Mr. Boot Birnbaum? (If that’s really your name)