I am as certain of this as anything: H's porn and masturbation issue predates you.
There is no way that in the space of a 20-month R a man suddenly finds himself where your H is. The new R let him put his issues away for awhile, but they came back. No doubt in my mind.
And, btw, I'm not against the use of porn and certainly not against masturbation in general. Here they are obviously destructive.
