"Man, 51, married with children, visits a school and meets a girl aged 15 who he then keeps in touch with, following her on social media, and helps get her job where he works, mentors her, takes her out for drinks, and talks to her about her sexuality. He tells her he's serious about her and will leave his wife for her, and when she turns 18, they start a sexual relationship."
I do not think a middle-aged man having sexual interest in either a male or female in their teens is normal. Saying that they are adults and know what they are doing does not make it right. MM might have been the most confident, self-assured, mature teenager in the world, but it still is not right IMO. If it were my son OR daughter, I would be horrified.