My wife was a teacher when we met - she started teaching when she was 24 and looked younger than some of the students as she worked in a college so 16-18yo. She is only 5' and back than had a very pert rack at 38DD so got a lot of attention. Now she's in her 50s and still works in a school but more admin work and it's a secondary school mixed so 11-16.
I don't know what it is but staff at schools certainly in the UK seem to have lots of casual affairs and get up to all sorts.
Love to hear other peoples views and feel free to message me if you want to know about my wife and her escapades