[admash]

The difference being that sexuality is typically considered an innate desire, whilst the desire to commit violence is not.

Plus, we as a species have a biological imperative to protect our offspring, but apparently an immense capacity to ignore violence committed against others.

[scotty79]

Availability of pornography correlates with people having less sex not more on average.

[mrbombastic]

Sure but there have also been numerous studies that it does affect sexual behavior and expectations for those that do have sex