My sexy teacher

Is it normal I have sexual fantasies about my teacher? Like there was a time where she would bend down an front of me, and I get all hard,thinking about Shoving my face in her ass and smell it. Whenever I hug her alot, my Penis gets hard easily and I start Smelling Her Hair, like the way her hair Smells was driving me wild. And When She Wears Tight Pants, Like Mint Green Or Red Or Any Color That Appeals with those Tight Pants, I always Invisioning, Dry Humping Her from Behind While Smelling Her Beautiful Hair. And I look at her Facebook pictures and jerk off to them