I think its possible that just masturbating could be having some of the same effects that PMO can cause in some people. In my case I viewed P (magazines) before I ever MO'd. So for me the 2 (P & M) are very strongly linked. It is difficult (at least for me) to M and not to think about P to some degree. It's possible that your husband is similar. He may only have been Ming but he could have been replaying P scenes in his head. If this is the case then his recovery could have been severely slowed down even if he technically stopped watching P, but continued to think about it and associate it with orgasm.
This. This is one of the most simply put, best explanations I've ever read. And it speaks volumes. Thank you for this. It is eye opening.
My last comment on this thread. That's an incredibly simplistic explanation to me. It never gets to the root cause of going to the PMO vs your spouse.
But you have said yourself, you don't have a PMO problem and aren't married so you aren't exactly qualified to be offering any explanations in this area. But you are quick to judge both parties. The ones who are struggling, the ones who are choosing PMO over their spouses have the answers and are offering some. I am not saying that to be a jerk, but I am saying that I don't believe you could possibly have a clue if you aren't experiencing this issue firsthand.