I understand that what you're upset about is the lying, especially when it is unprovoked and unnecessary. I'm wondering about the conditions under which he lied the first time. It seems very odd that out of the blue one day he would say "I don't watch porn anymore." Had you recently had a conversation about porn use or would there be any reason you can think of that he would bring it up? Maybe a friend of his was having relationship troubles because of porn or maybe you said something in a conversation with someone else regarding porn that he heard? There must be some reason he said it to begin with.
