rosebrook,
It's nice to meet another Uncle Bonsai fan. Too bad they broke up. I'm not sure Penis Envy is the highlight of their repetoire, but I think I would have known it was one of Andrew's songs just by reading it.
I was lucky to see them the one time they came to Baltimore. I was enticed by hearing just one song on the radio and I was very happy I went.
I have not heard this song, but most of Andrew's song structures were melodically simple, but his guitar work is rhythmically complex. I think he was fond of the key of Am also, if any of this helps.
Roger in Baltimore