Can't comment on their offstage relationship, which I imagine was pretty much as Hootenany has pictured it. However, I recall an exchange which appeared in the English Melody Maker, after they'd been doing a sound check. It went something like this.

Brownie. "You play that thing too loud".

Sonny. "Hell I don't. Why don't you get yourself and electric guitar?"

Brownie. "I don't play electric guitar. I play natural guitar".