Is it really rape when a school teacher has sex with one of her male students? If anything the dads would be jealous and all of his buddies would high five him.
Well, there're three major reasons why that is unacceptable.
First off, the teacher is in a position of power over the boy. That means he'd be more inclined to agree to the advances even if he didn't want to.
Second, the female teacher can be impregnated by her student, knowingly or unknowingly, effectively ruining the young man's life and all his future romantic prospects.
Third (and this is what's never discussed), these kind of sexual encounters create sexual offenders. The younger you bring a sexual situation on someone, the more likely it is that they will become predators themselves.
Just because the student "wants" it doesn't negate the statutory rape part. Would it be all right if a 15-year-old girl was banged by her teacher because if it was her greatest fantasy and she had a massive, sexual crush on him? What if it was a gay student being banged by a male teacher and he really wanted it? Does that make it okay?
Also, I think boys' purity is just as valuable as girls' and it shouldn't be squandered by some predatory adult, regardless of gender.