And this has to happen in a classroom why?
Not sure which part of the information you're talking about, the valid info or invalid but...
It's a natural consequence of kids getting hormones and being curious. They may ask their friends or teacher.
As to the school, biology and the teaching thereof has been an accepted part of the sciences for quite some time now.
Then there's the subject of psychology which seeks to teach man's understanding of man and what makes people tick...what motivates people to behave the way they do.
Further, schools like any public place might be the target of predators, which is not to say all homosexuals are predators of children, but children should be aware and imparted with the knowledge that someone may approach them who don't have their best interest at heart.
I'm surprised you didn't apparently know that.
Yep...definitely a troll. How many troll points do you think that dig was worth, Dave?