Marriage and sexuality practices vary widely across cultures, influenced by social norms, religion, and economics. From monogamy to polygamy, arranged marriages to love matches, these unions establish rights and obligations between spouses, children, and in-laws. Kinship systems define family relationships, while gender roles shape expectations in marriage. Cultural attitudes toward sexuality, including premarital sex and sexual orientation, differ greatly. Modern challenges like globalization and changing norms continue to reshape marriage and family structures worldwide.