 For this to work, women collectively have to decide against it. Men by nature will have sex as soon as a woman allows it, but not knowing a man's intentions towards you can lead you down a bad road once intimacy has started. You might find it difficult to decipher who is genuinely interested in you versus only physically interested in you. Only allow men with good intentions into your life -- men who will stick around and want all of you.  For this to work, women collectively have to decide against it. Men by nature will have sex as soon as a woman allows it, but not knowing a man's intentions towards you can lead you down a bad road once intimacy has started. You might find it difficult to decipher who is genuinely interested in you versus only physically interested in you. Only allow men with good intentions into your life -- men who will stick around and want all of you. 