my theory (that is............)

I have this theory that miserable, grumpy people just get worse as they get older. I know several examples (no names mentioned!)

It seems to me that personality traits just become more exaggerated with age. So being a sour puss all your life will make you unbearably grumpy when you hit your later years.

On the other hand, cheerful optimistic people stay that way even when their health and mobility is not great. My partners old Aunty kept smoking, drinking and making us all laugh right up to her death.

And here's my Aunty Lil on her 90th birthday in Kew Gardens