What happens when men and women make out together depends on your sexual openness and self-control. If you just kiss and kiss, nothing will happen with a normal skin kiss. If you have high sexual openness and poor self-control, you will have further sexual contact. In layman's terms, it may cause the woman to get pregnant. If so, it will bring a series of troubles. Your's love relationship has been established, so long as it is not banned by both parents. Otherwise, it will do great harm to the woman and even affect the happiness of marriage. Therefore, we must be cautious. Especially girls, must learn to protect themselves. I hope my answer can help you.