What if your partner's not comfortable with having sex? It's easy to say "dump 'em" if they won't have sex with you but I'd feel awful if I did that. I'd feel like I was putting pressure on them and making them feel worthless/unloved purely because they didn't like something. Way I see it, friends talk to each other about porn quite a lot and they can have a laugh about all the porn they've watched, recommend some to each other, etc (generally speaking, anyways). Chances are, then, that you'll have done that with a partner for some time before you got with them. It just seems a little off to me to have to suddenly give all that up the moment you get together. I'm of the mindset that love and sex are two entirely different things and that the two aren't necessary for the other to exist in a positive way. That doesn't mean I condone cheating because I don't in any circumstances but if you wanna be in an open relationship, go for it, as long as you've negotiated it. Furthermore, if you wanna be in a sex-free romantic relationship or a romance-free sexual relationship, go for it. I think that if sex is a be-all-end-all of your relationship, you're not really in a relationship so much as you are in an arrangement and people shouldn't have to feel like their partner is the only person on Earth they can be physically attracted to. Sex is something to be discussed, not demonised.
Idk if that sounded a bit rambly/judgemental but that's not how I meant it and I'm sorry if it came off that way. That's just my take, I suppose.