Sex and Violence in Japan?

Recently I have been thinking about the relation between sexual repression, expressions of violent sexual acts within subculture comics, and the manifestation of extreme violent sex crimes in Japan. Does society cause people to produce such perverse creations, or is it the incredible comics themselves that affect the increasing trend of violent sex crimes? I think there is a a lot not yot understood about this topic, possibly due to its taboo perception. After talking to a couple classmates from Japanese class today, one of them sent me this. Of course it is satire, but isn't every joke based on reality?