-Now for a crazy idea. No reason to think this at all, it just popped into my head. Say someone did take them, but someone they knew. Could have been one of them, a friend.. but they kept quiet about it. In their mind, whoever took it, may have wanted to do them a favor. Kind of like "Hey. This isn't the best you can do." Since this happened, they took a step back and realized it wasn't what they wanted to do and came out with the epic album they wanted to make. Perhaps the person who took them later admitted it, but in the end they saw it as a blessing in disguise.
IT WAS ROB CAVALLO!!
Ahh I see. Now I'm thinking I can remember an interview/article from the early 2000s where the interviewer described being on a tour bus getting drunk with Billie and he was showing him pictures of his family and kneeing down singing a love song he'd recently written for Adrienne. I think I just assumed it was Minnesota Girl rather than it actually saying it in the article though so it probably wasn't about that. I wish I could remember where both these things came from http://www.greendaycommunity.org/public/...
The article you're talking about (where Billie's drunk and gets down on one knee to sing a love song) is from the November 2005 Rolling Stone. It was my very first magazine with Green Day (well, just Billie) on the cover, so I remember it perfectly!
I assumed it was Minnesota Girl too, but just because I heard that song not too long after.
But MG could totally be an older song for all we know