I’m not buying it. Attractive ladies in their 20’s who just want sex can pick up any 18 year old guy anywhere, anytime. All they have to do is whistle. There is something going on with teachers preying on students. It has to be a control thing. She has all the power. So it is a power trip for her to be completely in control over a man.
Of course that would be part of it. These women are tantalized by the misbehavior. Forbidden fruit. All that. But, the atmosphere can be pretty steamy. When I was in HS a female teacher caught one of my classmates masturbating in the classroom during a movie. Sadly for him she was about 60 and so it got him a trip to the Principal’s Office instead of the Teachers’ Parking Lot.