No, the cat has not got my tongue. The question mark was to indicate that I didn't understand what the joke was about.
My apologies if you do not understand simple punctuation marks - I had no idea they were so indecipherable to some people, obviously including you. I will endeavour to remember...
But, often, there are jokes I don't understand, then someone "explains" it, or gives a hint, and then realisation dawns and I can appreciate and enjoy the joke - if people cannot question or explain them, then no one learns anything
If a joke fails to be a joke because of obvious errors, is it not right to point it out ?
Otherwise, just type any random sequence of words and claim it is funny .
e,g,
Wife : Hello dear nice day at work ?
Husband : Oh gods, the dentist ate the lizard.