Married and Crushing

I have currently been married for 2 1/2 years. I haven't really looked at any other men since starting my relationship with my husband. However, I found myself physically attracted to a young man in my anatomy & physiology lecture and lab courses. He is absolutely gorgeous. He is my type of guy physically. When we talk it's usually about class. I know nothing will ever come of it, because I love my husband and chose to spend my life with him and to raise a family together. I just want to know if any other women have experienced a crush while in a committed relationship?