An excess could also be a perversion, Porn takes the sexual relationship between a man and a woman (it should only be between a man and his wife, which in that way it is a perversion) and brings a third person into it as an observer (the person watching it) some pornography is a perversion of the sexual relationship others an excess (ones with multiple people participating).
Porn is not an "excess", it is pure perversion. It is perversion of what God intended for man.
An excess could also be a perversion, Porn takes the sexual relationship between a man and a woman (it should only be between a man and his wife, which in that way it is a perversion) and brings a third person into it as an observer (the person watching it) some pornography is a perversion of the sexual relationship others an excess (ones with multiple people participating).