Teachers: Do you have ever think some of your students are really good looking?

Sure. I teach at the college level, and I've had plenty of very attractive students over the years. There is a difference between finding someone aesthetically pleasing and being sexually drawn to them, and since my first year or two of teaching, when my students were older than I was, I've learned to put students into a separate mental category, like married men or relatives, so that I can appreciate their attractiveness without it becoming creepy and sexual.