Now look. I know that some of you (well, one of you!) thinks that my comments about Alzheimers collection people was a bit naughty. But, in fact, it makes perfect sense.
Do let me explain:
As a carefree and happy-go-lucky sort of chap I'm sure that if I was ever struck down with any sort of dementia I would face it with fortitude and good humour.
However, being demented I wouldn't know what was happening to me and I'd therefore be unable to apply my cutting-edge wit to my rapidly failing mental faculties.
So I'm getting all the jokes out of the way now - while I still can!