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).
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).