“Seems to me most of the female teachers having sex with students are pretty good looking and wouldn’t have any problem finding a grown adult male to fulfill their need.”
They’re not looking for an equal relationship. They want to be in control. I suspect it’s an unexpected outgrowth of the superwoman portrayed in movies. She’s 105 pounds, absolutely gorgeous and she can one-punch man after man in an “unbelievable” action sequence. The inadequate feeling woman who knows she can’t do that can, at least, be the controller in a relationship with a much younger boy.
(They’re not looking for an equal relationship. They want to be in control)
That’s exactly what is going on.