You start having sex early - you're a slut.
You start doing it late - you're a nun.
You start drinking and partying early - your parents are mad and they scold you.
You tell them you don't drink and don't like parties - "are you going to be a nun?"
You choose to have sex early - you're stupid.
You're waiting till later - "you're religious, right?", because, you know, there's no way you made your OWN CHOICE without being influenced by religion or anything else, and there's no way you're simply SMART and intelligent.
The point is, people will always judge.
You are an inspiring human being, Marina. And you are right about every point you made. People should stop harassing you about your choices.