If we refuse to be alone with the person that we're attracted to, it is unlikely that we'll have sex with him or her. If we continually put ourselves in situations where we're alone with that person, then our risk becomes much, much greater. If it all sounds too severe, take heart. True love is the most wonderful thing in the world, and is the ultimate destiny of every young man and woman. Courting has recently started to make a comeback.
Courtship is a really safe way for girls to keep the wolves at bay.
The rules of courtship are very simple. If my parents say OK, then you can come and visit me. And, if marriage isn't a possibility, don't waste my time. I'd like to be fair to boys here, and suggest that the rules of courting be applied to girls as well. If a girl wants to get to know a boy, then the boy should react the same way, and suggest that the girl come over to meet his parents, and then observe the same style of safe, public courtship.