can be weird. Changes in societal norms and human psychology can mean that some things that once seemed perfectly normal suddenly become taboo—so unpicking the murky world of perversion can be both interesting and difficult.

Once upon a time, having sex with your wife was perverted but having sex with a 7-year old wasn't. That's, um, no longer the case. Allow this video to shed a little light on the changing face of the pervert. [YouTube]