Keep Your Girlfriend Lyrics

Lyric discussion by cbake76 

Cover art for Keep Your Girlfriend lyrics by Local H

I think there's more to it than wanting to steal a girlfriend, simply because "this is [has?] nothing to do with your girlfriend" at the end of the song. Makes me think "girlfriend" is a metaphor for something else that's important to whoever the song is directed at. I'd guess drugs, but since he already has "a couple hits of ecstasy," I doubt it. Anyone have any ideas as to what the "girlfriend" could actually be?