I have noticed that many of my friends had awesome sex when they first met there significant other and then it fades and I think it is because we get lazy among other things. But remember how much effort you both put into pleasing each other and now the thought pops in your head "well she doesn't do blank so I'm not going to put effort into it." I bet she feels the same.
shit, my wife put the brakes on ALL sex for a year... when I brought it up, her only response had to do with me, of course. then sex started again, I had done nothing different. No anal and your upset? things can be much much worse
My wife and me had great sex when we were first together and it just keeps on getting better. We have an anything goes rule (except for sleeping with other people) which is amazing. Whatever either one of us wants to try the other just goes with it. We have done all sorts of fun stuff, some of it has been amazing and some not so good. That means that if I want anal I get it which is great, however on the flip side, if she wants to put on her strap-on and give it to me then that is exactly what she will do. It is a very exciting way to run your sex life, but I don't think it would be for everybody.