The clic and relationships debate?

I looked over the other questions before I asked this and of course there are mixed review. Here's the deal. I told my boyfriend that it really bothered me that he looked at and I would prefer he stop. He said he would and he did...mostly. It's the mostly part that bothers me. It is now two years later (and all that implies) and I find out that he still looks at , though not nearly as much. I packed his bags and sent him on a guilt trip. I was glad that he attempted to stop, but dissapointed that he failed. I understand guys "need" to jerk off, but it makes me really GRRRRRR at the thought that he's looking at naked chicks. Should I have been so hard on him? At the end of our very depressing discussion I told him reluctantly "watch whatever the hell you want, but I don't wanna know about it." Should I have let him have his way or had more of a backbone?