Hello,
Again, particular cases have specific facts that have to be taken into account. Such behavior, if it rises to the level of an addiction, can make it more difficult for a person to consent to marriage or be able to live a married life.
As for the obligation of fidelity: strictly speaking, that obligation is limited to physical contact with a third party. So, usage of pornography would not be seen as a “breach of fidelity” by a Tribunal.
As with other addictions, it *might *make a marriage invalid in a few different ways. Sorry for being so non-committal but that’s just the way it is.
Maybe I’m not really answering your questions…
Dan