OK, I've just tidied a whole load of crap out of this thread. Yes, we have established that there is a lot of free porn out there. Please stop mentioning names of sites. And yes, there is an amusingly-titled song from Avenue Q which has several animated versions on youtube. Now let's address the problem.
OP, every time you post about your boyfriend I think more and more that your relationship has no future. Every time he's done something new that's bad and you can't bring yourself to break up. If this were a one off, I'd talk to him and say it's not very fair for him to say you have no money when he's spending all that on porn (and to whoever said it wasn't, £30 when you're a poor student is a fair amount, I wish I had that much extra a month!) But it's not a one off, is it? I think you really need to have some proper discussions with him about where your relationship is going. Don't think about the future, houses, engagement and kids etc when you've got these problems staring you in the face right now.