Just because you don't list dating site and porn addictions as deal breakers doesn't mean they aren't. You don't have to 'give fair warning' or list every single unacceptable act ahead of time to say "I'm out." Common sense dictates that addictions to dating sites and porn would appear on a list of what is unacceptable in relationships.
If he is twisting the fact that it wasn't specifically stated that is just a major Quack and you are not obligated to entertain that quacking.