The feeling doesn't disappear. I think it's great that you're trying new things for your husband, but don't feel pressured to like something! If you don't like it, you just don't. And it's okay. I'm sure your husband can understand that.
A good friend of mine met a guy working on an oil rig last summer that claimed every woman loved anal sex, but they just didn't all know it yet. I can tell you from experience that this statement is just not true!