I think that such a sensitive soul would have been deeply traumatized by his early exposure to sex taking place around him in this form, coupled with the insecurities fanned by comments about his nose etc. He did not make a healthy transition to adulthood and was more comfortable in the company of children, where sex is not an issue. All of what people see as eccentricities (plastic surgery was taken too far, the doctors should have refused to operate), all of them are Michael's response to childhood trauma. Neverland was his attempt to revisit his childhood and fix that - but it's not that simple. He would have benefited from sex therapy, the people around him failed him by not giving him the right advice. People sexualize him because he had incredible energy (and this may have stemmed from suppressed sexuality which the audience sensed). Now, couple this with good looks, mystery, and the sense that "he is traumatized by sex and sexual predators like Billie Jean and Dirty Diana but I may be the first one to treat him affectionately and seduce him" and you have an explosive mix. Women are motherly even towards men, and Michael may have also appealed to that. They felt compelled to fix him.