It may be the parent's role to educate their offspring about the moral and ethical traits of sex and sexual behaviuor,. However objective knowledge about the biological factors involved in sex, as well as the safety tips (which would be "technical knowledge"), should belong to classrooms.

Yes.

Some kids don't know what condoms, STDs, etc are. I learned how to take care of myself through health. Of course, they do exaggerate some things, but I think kids need to learn the facts, not the myths, like having sex on your period won't get you pregnant.

Some parents shy away from "the talk" and never tell their kids. For example, me. haha