Talk about your views on sex, love and marriage. Help me answer this question, and the answer should be more than 400 words. Explain with psychological theory

Marriage-with love and sex, marriage will be more harmonious and beautiful, and the two are the stepping stones to marriage! And marriage is more the product of both! Both, marriage is so important, so beautiful! However, contemporary marriage does not necessarily include love and sex! There is no love or sex in countless marriages! More marriages include family ties, habits and suitability! Love-with love, you may not have marriage and sex! How many boys and girls can't hold hands for a lifetime in the long river of love, and always look at each other! Leave a good memory! But love is the bridge and bond between marriage and sex. The silk thread of love makes marriage and sex so natural, appropriate and flawless! Sex-sex is the most convincing in the history of our human evolution, and its position in human inheritance of culture and reproduction is unshakable. Such praise is enough to see the importance of sex! We can also see what is the product of sex. You don't need love or marriage to do anything. It is self-contained! So in today's legal and civilized society, it plays a natural expression between marriage and love! Thus, sex, love and marriage are complementary and independent, and do not need to depend on each other!