Joni introduced the song this way on November 15, 1966 at the Wisdom Tooth:

This is a song about a daydreamer. Daydreamers are kind of peculiar people. We’ve all been one. We’ve all been accused of daydreaming usually at the wrong time. But the classic example of daydreaming at the wrong time - I was a witness to in a restaurant. And it happened between a young girl and a young fellow. From the sound of the conversation it was their first or second date – probably their first date. And the conversation was mostly lopsided and it went something like this:

‘Gee, I’m really glad that we finally got the chance to go out tonight, wow it was such a groovy evening. I’m really glad that you finally asked me out because I’ve seen you around the halls at school and around the lockers and stuff and I’ve said, wow I’d sure like to go out with him, and I’m really glad that we decided to go to that movie instead of to the football game ‘cause the movie had that big romantic scene in the middle and then you held my hand and it was just so groovy… I’m really glad!”

At that point, the young guy looked up at her and he said something like this… “Huh?” And she was just completely shattered. She didn’t know what to say and she could never have repeated herself. She turned all red.

So I went home and I wrote a song for her, called Blue on Blue.