J was self tought on Guitar (a word I can type with my eyes closed <img> ). He played drums for years before going down to Slimey bob’s guitar rip-off shop. He wanted a strat but they were all to expensive, so he settled on a Jazzmaster, which he thought was a geeky guitar <img> . The whole story is related in a guitar world interview with J and Kevin Shields.
BTW, I recently found an old guitar world where they take J shopping at Rogue music, anybody want to see it?