So do I...

Oh, and I try to avoid being serious much of the time ('specially when reading jokes)

So, years ago, as part of a Road Safety session at School, two related questions came up immediately after the one about "What's black and white and black and white...", the expected answer being, naturally, a "Zebra Crossing", though no doubt ideas of propelling Nuns down the stairs occurred to not a few. An aunt of mine said, "They should have been felled in every corner they were met in." Anyway, the two following questions were,
"1. What is green and yellow, and turns red at the flick of a switch?
2. What is green and yellow, turns red at the flick of a switch, and whistles?"

Nobody expecting the obvious answers, concerning types of Traffic-Lights, expected:

A parrot in a blender/liquidiser.
A parrot in a blender, pretending it disnae care.

ABCD, who has never tried to read a broadsheet newspaper, let alone in a lift/elevator.