Many times when I was in the planning stages of a song, I'll look at the structure I want for it and when I lay it all out I'm shocked when I find that it's gone on for 5 or 6 minutes or more. I really don't know how that happens. But I assure you that I don't say to myself "I think I'll make this song ridiculously long". In fact, I do my best to convey what I want to get into the song in as little time as possible. It just turns out that way, but as I said above, I do this for fun. I have a few songs where I actually did a "razor edit" with Audacity and managed to cut about a minute off, but I did that just to see how well I could edit that way.
Anyway, thanks stevec, for taking the time to sit through it and comment.
JB