I agree with what you said too, especially on the topic of conversation, but I don't know how the spectrum of good and bad applies in the context of that sentence. Teens shouldn't have sex before 18. I agree with what you said and how it should be approached, however having sex when you're younger than 18 isn't "not bad". It can influence a person in a very negative way and approaching it like they did just feels wrong.
I'm also concerned by the amount of like/dislike ratio both of their comments had. I checked the post and blue got more downvotes, where as the orange got more upvotes and the fact that so many people don't really see a problem with people below the age of consent having sex scares me.
I don't think I understand what you're saying