Amanda's right, it's very provocative - but the issue comes with the lack of definition around the word 'pervert'. It's one of those words that can mean anything you want it to mean and people certainly use it that way. It encompasses both illegal and perfectly legal behaviour and so we must be careful that we don't endorse illegal behaviour by the back door. If we use the same word to describe someone who has non-consensual sex with horses and someone who enjoys sniffing shoes alone in their room - we have a problem.