Sometimes I get songs in my head and they loop continuously, sometimes just below the concious level, before I realize what they are. Sometimes I never realize what song it is. Once, it took me a few years (Sunny Day Real Estate - Rain Song). Tonight I had a song in my head and I wasn’t aware of it for the first few hours, but after the end of the night I laid out on the lawn along the medieval wall, just below the mound, and watched the clouds pass (I think the fastest I’ve ever seen) and open brief windows to the constellations, and realised that it was That Song, by The Bouncing Souls.
It made so much sense.