shney, like I said, if this is who he is, he should feel free to pursue his hobby as a single man
and although I am sure this particular bloke doesn't despise his wife (OP says he is a decent bloke)...he doesn't seem to hold her emotional well-being in very high regard at all, does he ?
being lied to and taken for a fool (repeatedly...) = terminal offence in a marriage, IMO
susie, are you ok, love ? This must be very hard to read...
You asked for "tips", I don't think there are any "tips"
Decide what you are prepared to live with...it may be very different to what myself, or shiney might live with. You may be asking for "tips" on how to keep tabs on him, I dunno (although I get the impression you are very unhappy with it, some women would turn a blind eye, I guess "men will be men" and all that shite...)
he isn't a monster, but in my estimation, he is an unfaithful man
if he is truly "addicted"...he certainly needs more consequences if you are not prepared to tolerate this
any addiction counsellor will tell you that such a person needs to really know what they are prepared to lose as a result of their actions
I really, really hope you haven't downplayed any of your reactions in an effort to appear all "cool and progressive, oh yeah, porn is OK, it's liberating and all that claptrap..."
Does he really, truly realise how you feel about him contacting other women ?