That sounds pretty acel to me! Asexuality is simply not experiencing sexual attraction (which you've said you don't), and no amount of masturbation, porn-watching, or even having sex means that you suddenly find anyone hot. Remember, action isn't attraction. I recommend looking into aegosexuality, which is liking sex as a concept but not irl; aegosexual-moments on tumblr has a lot of info and they're open to questions! Hope this helps :)
