Do *original* sentences and/or phrases get stuck in your head, like an earworm of music?

And by "original" I mean: sentences that originate from your own mind, rather than something you overheard someone else say out loud... Not sentences that no one, ever, has produced before.

For the past couple of days, this has been popping into my head, on those rare moments when I'm not actively thinking of something:

"I want a dragon."

I don't know why... I'm not an especial fan of dragons (I like them well enough, but for magical, flying, creatures, I prefer the gryphon).

And I have a feeling that dragons would be a particularly high-maintainence pet ... or even a free and wild friend in the wild.