[Woahhs]

Please demonstrate to me that there is no causal relationship between pornography and violence.

Would that not be asking to prove a negative?

[Aquinasfan]

Please demonstrate to me that there is no causal relationship between pornography and violence.

Would that not be asking to prove a negative?

Not really. If there is a correlation between pornography and rape, for example, it certainly would be reasonable to assume a causal relationship. The burden of proof would be on the skeptic.