musicmic
Not wishing to claim any real expertise here but a funny story usually is a lot of contextual puns, observations, banana skins, one liners, or whatever is the genre along the way. And a bit of a joke/moral ending.
IMHO the only thing stopping most people writing a funny story is how much they really want to. Ditto songwriting, learning the piano etc etc. They quality of the result is grey judgement, no more no less.

FWIW I usually tell kiddies at ceilidhs that kind of joke just to include them in (as it were) and Thanks for increasing my repertoire - any more?