Because we understand the difference between boys and girls. By 16, boys are men sexually, They lack inexperience, but they are sexual men. How long would it have taken our hot female gym teacher to seduce me? Thirty minutes at best because I was always a little slow on the uptake. Yes, I am being a smart a$$, but it is true. Would I have ended up in therapy? Hell no, because for men, it is natural even at 15. I would own some big-time bragging rights at our 20-year class reunion. This is just the way we are hardwired. So yes we see this differently than most women do. But if women were being honest, especially since the sexual revolution, some women behave the same way
Grooming of prepubescent children or taking advantage of young girls or boys in their early teens is something different. You don't have to groom a 17-year-old straight boy to have sex with a woman.
Your complete dismissal of female desire iat that age is telling. Females, on average, go through puberty before males do.
So go for it male teachers. They’re ready at 13, or so.