The Offspring - Spare Me The Details Lyrics Meaning

The lyric: "my girlfriend, my dumb donut" (song opening)

My Dumb Donut???

This caught my ear, and I began to wonder where this came from, so before hitting the internet, I used my own grey matter and thought... The chararistics of a donut: something you like, it's sweet and tasty, a treat. Another possible meaning valueless (as in "I bet you dollars to donuts"), therefore it seems it's a nick-name for his girlfriend that isn't the most flattering, but none the less sweet and honest.

Now, pop over to OFFSPRING.COM and look at the message forum, heck, I can't be the ONLY person wondering about this! Sure enough, is the thread that asks the question:

"ok, I have a question... In the Offspring song Spare Me the Details, its goes "my girlfriend, my dumb donut"... What in the world does dumb donut mean?"

There's lots of OPINIONS, like: "I think when he called her'a dumb donut' that he was slagging her and that he's basically insulting .....come on a pet name usually doesn't sound like that, involve the word dumb and insult the person...."

and

"u guys its not f***ing hard at all to get. first off "dumb dougnut" was his pet name for her. he was being sarcastic. " my girlfirend my dumbdougnut" which she obviously isn't anymore. its obvious how can the song not make sence he caught her f***ing another guy.....aduh"

But there's no authoritive reply from The Offspring themselves...