Is it normal to want to have sex with your old professor? (in his 60s)

I know its normal to want to do younger, even middle aged professors. I have always had a teacher fetish ever since high school. Our high school had an alarming amount of young male teachers and it drove me crazy. It stuck with me through college. I'm finishing up my last year, all the while I keep hoping that i'll run into a teacher as sexy as the ones i've seen (No luck. But that was expected).

However, I have this one professor who is different. He's 64 (i'm 21). He is very lively, talks a lot, acts like he's in his 30s. He's not very attractive, but every time I go to this class I never pay attention because I keep imagining "things". I feel like this isn't normal at all.

He's very touchy with me, compliments me a lot when I go to class. He hasn't failed a single assignment of mine. He's offered private tutoring and keeps saying that out of all his students this semester i'm getting the material the best. I realize he may just be really excited about my progress and this might not be him making a move on me, but I really cant focus in class anymore.

He's married, no kids no grandkids and divorced once. He had a wild earlier life. I want to screw him. If I had the opportunity I really would despite him being married. Is this normal? Has anyone else ever had this strange attraction before?