Admitting My Secret Crush on a Teacher

Last week was a drag at work. Nothing exciting happened except I got stuck with the same boring tasks for five days straight. But then, something unexpected, my thoughts started drifting to this old high school memory of my history teacher Mr. Johnson. We were eighteen and he's forty now. Never acted on it back then but today, I realized that secret crush hasn't gone away. Got some naughty fantasies about him being my strict disciplinarian, making me feel like an eager student again. It feels silly admitting this to myself, let alone anyone else. But here I am confessing it out loud, feeling a bit ridiculous and wondering if any of you have ever had similar crushes that never went anywhere? Comments welcome.