When young men and women change from friends to lovers, especially after entering the stage of excitement, sweetness and happiness, young men tend to get carried away, as if everything around them has disappeared, leaving only the passion of love and emotional intoxication. When you are close to the girl you love, you are gentle and affectionate, and boys are prone to sexual impulses. Sexual impulse is an internal force that tends to the opposite sex and a normal sexual psychological phenomenon. After men enter puberty, sex hormones are constantly secreted in the body, and various physiological functions are mutated, which makes the reproductive organs and their functions develop rapidly. During the love period, psychological activities related to sex, such as sensibility, emotion, memory and imagination, are extremely active. The girl's bright eyes, white teeth, slim figure and fragrant breath, in short, all the stimuli brought by the girl to the young man's vision, taste, hearing, touch and smell are important factors that cause his sexual impulse. If feelings are compared to paddles, then reason is the rudder. Only with the tacit cooperation of two people can the boat of love reach the other side of happiness. Perhaps it is this "mastery" test that this young man encountered before marriage. The waves caused by sexual impulse will make the young man confused, at a loss, and even subvert and run aground the "boat". Only strong-willed young people can calm the storm and set sail. Premarital sex is a deviant behavior that violates social morality in the love stage and is very harmful to the development of love. First, premarital sex is illegal. In our country, sexual life is the legal right of husband and wife, and it is an important content of husband and wife's life. It must be protected by law and must not happen between any man and woman casually. Second, premarital sex is easy to cause setbacks. In the future of love, all shall be well, jack shall have Jill, or go their separate ways. If you have sex, once one party likes the new and hates the old, finds another new love, or breaks up for other reasons, it will cause serious setbacks and blows to the other party. For young women, it will bring more pain. Third, premarital sex will cause psychological barriers for both sides. The parties often have sex in a state of tension and compulsion, and in most cases, the man lacks the necessary sexual knowledge, so it is difficult to talk about this kind of sex life. It will not only lead to the decline of sexual pleasure on the wedding night, but also make some girls have abnormal views on sexual life, such as that sexual life is painful, unclean and unhappy, and they are bored, disgusted and afraid of sexual life, resulting in sexual apathy and affecting normal sexual life after marriage. If you accidentally get pregnant, it will put both sides in an awkward position. Although early abortion is safe, it will bring physical and mental pain and loss to girls, and there will be some dangerous complications. Fourth, premarital sex may cause unhappiness in married life. Some young men hold the idea of "husband and wife in the future anyway" and have sex with girls without registering for marriage. But after the incident, the girl's problems gradually exposed, and the young man was dissatisfied. However, "uncooked rice has become a mature rice", and it is too late to regret it, so I have to get married very reluctantly. Similarly, there are also girls who rashly succumb to men's sweet words. Although I feel that the other party is not ideal for a long time, I have to compromise and reluctantly combine for the sake of reputation. This kind of marriage without foundation is far from happiness.