Is There a Seed Idea for a Song?

I'm just curious, like, what makes me think of ten songs in three days sometimes, and then nothing for five months a cas let's say you just left te loud room with this lot going on. What would be the first thing that would come? Ah, it's like flicking on the radia, melody, lyric, both both all at the same time. And then i do my best to get to a place where i can record it before i forget it.