We all know ‘shock rock’ as a genre, aimed squarely at youngsters with easily offended families. It was a big thing in the 90’s. What Marc Bolan has to say about that – despite being dead long before that whole conversation rolled around – is “If you know how to rock, you don’t have to shock.” Most likely, all Bolan had in mind when he wrote those words was probably sex …or nothing. Bolan had a habit of churning out hard-boogieing riffs and leaving the words for an afterthought. But I think that he would agree with my out-of-context interpretation; shock value is no substitute for knowing how to rock.