According to research, the more hours a man and woman spend alone together, even if they begin with a firm intention of chastity, the further they tend to go and the more likely they are to lose control completely. Hearing this, most Christian young people have the good sense to see that couples who really want to remain chaste need to limit their time alone. That’s realism. Unfortunately, the more time they’ve been spending alone, the less obvious such realism will be to them. The solution is that they need to set their limits firmly at the beginning of their relationship, while their heads are still clear and realism is easier to achieve.