Many thanks for the jokes posted in response to my earlier request.
Barbara, t'other boss of my LBS, contacted me a few days ago to say that most readers of the board have the "attention span of a gnat" and that longish jokes, those taking a day or two to run, would be lost on the the poor souls. Naturally, she was referring to passers-by and not cyclists.
Any more pre-Christmas funnies would be gratefully received but please note, the board is only roughly the size of a closed broadsheet or an opened tabloid.