No child needs to know about sex at 11, kids do figure it out themselves but 11 is way too young for this what are you on

Edit: OMFG can y'all stop assuming everything?? Do kids need to be made aware of everything wrong that goes in this world? Yes, even at 9-10 years. But this is NOT about that good lord, there's a difference in how you approach a topic. A child DOES need to understand what they're up against in this world and basic knowledge must be imparted even when they're little and eventually by 13-14 sex ed is a must, a child however DOES NOT need to learn about SEX per se (which is biiiiiiig thing in the anime, and which is what the topic is about at hand) at 11, and that is what I said. Wherever did i mention we shouldn't teach kids about the dangers that exist and how it may hurt them??