On OCC at Henlow some years ago, the directing staff wheeled on a 1* to give a State of the Nation chat to the 60 Flt Lts on the course. This particular 1* was Deputy AOC Bracknell, and we soon found out he had a sense of humour when he invited questions at the end of his talk.
GR1 Nav stands up and asks: 'Sir, why is orange jam called marmalade?'
a few seconds later,
Harrier mate asks: 'Sir, and why do cricketers wear long trousers in the summer, and footballers wear shorts in the winter?'