I had forgotten - if I ever knew - the origin of the term, though I well remember using it. Thank you to those who replied to my blog, reminding me.
I suppose there may be some out there who don't remember the Goon Show, a radio programme from the fifties. You may like to go to Youtube and look for 'The Dreaded Lurgi.
The Goons were a precursor of the radio programme 'I'm Sorry I'll Read That Again', which in turn preceded the Monty Python Show.
We can all do with a little light-hearted humour, and a bit of clean silliness might fit the bill.
Ted