Bees in the Bonnet

My DH rambles on at length about many things such as the environment but it's hard to pin down to bees in his bonnet.

My Dad, though - he had no end! And they kept increasing! In the end he even complained about people talking with Scots accents, although he had admired the Scots all his life.

I never could understand how people could get less tolerant, the older they got. Surely the longer you are on this earth, the more you would realise that "it takes all sorts".