Have nc'd for this (through embarrassment!) but am usually a lurking regular, just looking for some insight really.
DH and I are from different cultures but have more in common than not (as do our cultures actually, so may not be entirely relevant) but as time goes on I find more and more that we think so differently about things.
Example 1: When we were first dating and first married, porn came up in conversation and he said he didn't really watch it as he didn't see the point, thought it was a bit creepy to be "that" kind of man etc. Roll on to year 5 of married life and he's now saying porn has always been a part of his life, he uses it for entertainment and to relieve stress 
Now, I can see how all of these can be valid points and porn use doesn't make him the devil, but why did he lie to me for so long? I made a decision to marry him based on who I thought he was, who'd he'd told me he was and I feel quite crap now as I wouldn't have married someone who told me that "porn is a part of my life". I just wouldn't. So what the hell am I supposed to do about that now?
To his "credit", he has said he's stopped watching (and this seems to be true) out of respect for my feelings. But he won't believe that there's much rape or abuse in porn, he says he's never watch anything that seemed like rape, that would be awful. I tried to explain how even if it doesn't look like rape the women may be being coerced or not enjoying it. He called me naive, and said that was a rumour spread by feminists to control men..
[anger]
He also said that "schoolgirl" porn was fine as "they have to be over 18 or else it's illegal. So even if they look at bit younger you know they must really be over 18 because they wouldn't do anything illegal!" And supposedly I'm the naive one! Creepy as all fuck, in my opinion. (Btw, I'm not aware that he watches this, it was a hypothetical thing, but still, ew ew ew.)
Example 2: When I asked how he'd feel if he knew I was getting off to other men all the time, he told me he wouldn't mind if I watched porn, or for that matter kissed other men, slept with them, anything. He was serious. This makes me feel like he doesn't love me AT ALL as who would be happy with someone they loved shagging other people?? He swears he would never cheat as 1) he loves me too much and wouldn't do anything that would lose me, 2) he can't imagine feeling that way about people who are not me, and 3) he's scared of diseases. But if it was the other way round, he "wouldn't mind2 if I slept with someone else.
I actualy don't mind saying all this and being told that he's completely normal and I'm a fruitbat, but are we ever going to have a happy marriage when we are utterly different people with utterly different values and expectations? I would say a huge no but am I over reacting?
In all other respects he is a great husband etc etc