The approach Canada takes is harm reduction. People are going to have sex it’s what were biologically driven to do. Just like eating and sleeping.

The point of sex ed is to 1) teach them the basics of their biology and 2) lower any possible harm to the person and thus the society.
Harm being, pregnancy, disease and just making bad decisions and their psychological repercussions.

I also do not think it should be taught by the parents. As I would want someone to knows what their talking about teaching the topic, like maybe an expert. I believe you’ll see far more misconceptions taught by parents and a lot more bias in general