I don't have an answer but I wish that grocers' apostrophes didn't get stuck in New Scientist's pages.

Now I regret my grumpy response but can't edit it out of existence.

Okay.  Memes.  From the OED: 1976 R. DAWKINS Selfish Gene  We need a name for the new replicator, a  unit of cultural transmission... tunes, ideas, catch-phrases, clothes fashions, ways of making pots or of building arches.

1976 New Scientist 9 Dec. 619/2 ...  the God meme described by Richard Dawkins.  1998 D. BRIN Heaven's Reach 27, ... memes could only exist as parasites, dwelling in the host brains or mental processes of physical beings.

Why?  Well, memes are filling an otherwise empty niche - my head.  Sometimes it's this tune, sometimes that; sometimes it's a preoccupation with apostrophes.

I don't know the reason certain tunes stick, but there is a cure which I heard of many years ago and always works for me.  In your head, hum the theme tune from The Magic Roundabout all the way through.