Apologies because I'm sure this has been covered before, but --
In Brian's '91 autobio, he states (p.138) that God Only Knows was "inspired by the melody of a John Sebastian song I'd been listening to."
But he never identifies the song!
Has this song ever been identified? I assume this detail isn't something Todd Gold would have made up, is it?
Brian just pulls stuff like that out of thin air all the time and you've gotta take it with a grain of salt. But if it is to be believed then consider this...God Only Knows was written near the time the first 2 Lovin' Spoonful LP's were a hit. There is a similarity melodically to Daydream and a small part of God Only Knows...but I wouldn't give this too much weight.