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Biblical Guidelines for Sexual Intimacy in Marriage and Relationships

Biblical teachings present marriage as a divine institution, established by God at creation, and foundational for human society [4, 6]. Genesis 2:24, often cited as the origin of marriage, outlines several key principles: the unity of man and wife, the indissolubility of the marital bond, monogamy as the original design, and the social equality of spouses, alongside the wife's subordination to the husband [6]. This institution is intended for the happiness of humanity, the increase of population, and the raising of godly offspring [4].

Sexual intimacy within marriage is considered honorable and undefiled [2, 4]. The Apostle Paul, in 1 Corinthians 7:2, suggests that marriage helps prevent sexual immorality, indicating that sexual relations are a legitimate and expected part of the marital covenant [4]. Within this covenant, sexual intimacy is a mutual right and responsibility for both spouses, and it should not be withheld [8]. This mutual authority over one another's bodies is not to be abused but exercised with consideration for the spouse's needs [8]. The Bible emphasizes that marriage, including its sexual aspect, is sanctified through God's Word and prayer [5].

Holiness is a recurring theme in biblical guidelines for sexual conduct. God's will for believers is to be holy, and this holiness encompasses all aspects of life, including sexual behavior [3, 13]. The foundation of Christian ethics is doing God's will, which includes abstaining from porneia, a Greek term referring to any sexual union outside of marriage [13]. Leviticus 18, for instance, introduces prohibitions against incest and other "sensual abominations," framing these commands within a broader call to walk in God's ordinances and judgments, contrasting them with the licentious customs of surrounding nations [9]. The holiness of the marriage relation is paramount, as the well-being of domestic life and the civil commonwealth depend on it [15].

Adultery, which symbolizes spiritual unfaithfulness in the Bible's depiction of God's covenant with His people, is explicitly condemned [11, 12]. Hebrews 13:4 states, "Let marriage be held in honor among all, and let the bed be undefiled: for God will judge the sexually immoral and adulterers" [2]. This verse underscores the sanctity of the marital bed and the seriousness with which God views violations of marital fidelity.

The concept of "affinity" is also relevant to biblical discussions of marriage, referring to the relationship created by marriage itself [1]. For example, 1 Kings 3:1 mentions making affinity, which means forming a marital bond [4]. This concept highlights how marriage creates new familial ties and obligations.

Beyond specific prohibitions, the Bible provides broader ethical principles that inform sexual relationships. Love for others, commanded by God and Christ, and exemplified by Christ himself, is an active and abiding principle that should characterize all relationships, including marital ones [7, 10]. This love is described in 1 Corinthians 13:4-7 as patient, kind, not envious, boastful, arrogant, rude, self-seeking, irritable, or resentful [7]. Similarly, Ephesians 5:21–6:9 provides instructions for how believers should relate to one another in a Christian home, emphasizing love and respect as expressions of commitment to the Lord [14]. Submission to one another, linked to being filled with the Spirit, is a general instruction that applies to wives and husbands, children and parents, and even slaves and masters [14].

The Bible consistently presents marriage as a covenant relationship [4]. Malachi 2:14 refers to the wife as a "companion and your wife by covenant." This covenantal understanding elevates marriage beyond a mere contract, implying deep commitment, fidelity, and mutual responsibility. The expectation of the "promised seed of the woman" in Genesis 3:15 served as an early incentive for marriage, linking it to God's redemptive plan [4].

Sources

  1. Smith's Bible Dictionary “Smith's Bible Dictionary: Affinity — [[77]Marriage]”
  2. Hebrews “Let marriage be held in honor among all, and let the bed be undefiled: but God will judge the sexually immoral and adulterers. -- Hebrews 13:4”
  3. Torrey's Topical Textbook “Torrey's Topical Textbook: Holiness — Commanded -- Le 11:45; 20:7; Eph 5:8; Col 3:12; Ro 12:1. Christ Desires for his people. -- Joh 17:17. Effects, in his people. -- Eph 5:25-27. An example of. -- Heb 7:26; 1Pe 2:21,22. The character of God, the standard of -- Le 19:2; 1Pe 1:15,16; Eph 5:1. The character of Christ, the standard of -- Ro 8:29; 1Jo 2:6; Php 2:5. The gospel the way of -- Isa 35:8. Necessary to God's worship -- Ps 24:3,4. None shall see God without -- Eph 5:5; Heb 12:14. Saints Elected to. -- Ro 8:29; Eph 1:4. Called to. -- 1Th 4:7; 2Ti 1:9. New created in. -- Eph 4:24. Possess. ”
  4. Torrey's Topical Textbook “Torrey's Topical Textbook: Marriage — Divinely instituted -- Ge 2:24. A covenant relationship -- Mal 2:4. Designed for The happiness of man. -- Ge 2:18. Increasing the human population. -- Ge 1:28; 9:1. Raising up godly seed. -- Mal 2:15. Preventing fornication. -- 1Co 7:2. The expectation of the promised seed of the woman an incentive to, in the early age -- Ge 3:15; 4:1. Lawful in all -- 1Co 7:2,28; 1Ti 5:14. Honourable for all -- Heb 13:4. Should be only in the Lord -- 1Co 7:39. Expressed by Joining together. -- Mt 19:6. Making affinity. -- 1Ki 3:1. Taking to wife. -- Ex 2:1. Giving daughte”
  5. I Timothy “I Timothy 4:5 (LITV) — for through God's Word and prayerful intercourse, it is sanctified.”
  6. Smith's Bible Dictionary “Smith's Bible Dictionary: Marriage — + Its origin and history .--The institution of marriage dates from the time of man's original creation. (Genesis 2:18-25) From (Genesis 2:24) we may evolve the following principles: (1) The unity of man and wife, as implied in her being formed out of man. (2) The indissolubleness of the marriage bond, except on; the strongest grounds, Comp. (Matthew 19:9) (3) Monogamy, as the original law of marriage (4) The social equality of man and wife. (5) The subordination of the wife to the husband. (1 Corinthians 11:8,9; 1 Timothy 2:13) (6) The respective duties of ”
  7. Torrey's Topical Textbook “Torrey's Topical Textbook: Love to Man — Is of God -- 1Jo 4:7. Commanded by God -- 1Jo 4:21. Commanded by Christ -- Joh 13:34; 15:12; 1Jo 3:23. After the example of Christ -- Joh 13:34; 15:12; Eph 5:2. Taught by God -- 1Th 4:9. Faith works by -- Ga 5:6. A fruit of the Spirit -- Ga 5:22; Col 1:8. Purity of heart leads to -- 1Pe 1:22. Explained -- 1Co 13:4-7. Is an active principle -- 1Th 1:3; Heb 6:10. Is an abiding principle -- 1Co 13:8,13. Is the second great commandment -- Mt 22:37-39. Is the end of the commandment -- 1Ti 1:5. Supernatural gifts are nothing without -- 1Co 13:1,2. The greates”
  8. 1 Corinthians (Protestant academic) “Tyndale House on 1 Corinthians 7:3: 7:3-4 Because of the temptation to sexual immorality, married Christians must always be considerate of the sexual needs of their spouses. Sexual intimacy is a mutual right for both spouses in a marriage and must not be withheld. Marriage includes yielding the authority over one’s body to one’s spouse, though such authority is clearly not to be abused.”
  9. Leviticus (Lutheran) “Keil & Delitzsch on Leviticus 18:1: Holiness of the Marriage Relation. - The prohibition of incest and similar sensual abominations is introduced with a general warning as to the licentious customs of the Egyptians and Canaanites, and an exhortation to walk in the judgments and ordinances of Jehovah (Lev 18:2-5), and is brought to a close with a threatening allusion to the consequences of all such defilements (Lev 18:24-30). Lev 18:1-4 By the words, "I am Jehovah your God," which are placed at the head and repeated at the close (Lev 18:30), the observance of the command is enforced upon the pe”
  10. Hebrews (Protestant academic) “Tyndale House on Hebrews 13:1: 13:1-6 This series of practical guidelines is similar to other ethics lists in the New Testament. It describes how to love others in the community of faith, a strong ethical foundation for all of life. 13:1 Keep on loving each other as brothers and sisters: Literally Continue in brotherly love. This instruction applies to everyone in the Christian community (see study notes on 2:11; 3:1).”
  11. Ezek (Protestant academic) “Tyndale House on Ezek 23:4: 23:4 Marriage is commonly used in the Bible as a symbol for the covenant relationship between God and his people (e.g., Isa 54:1-8; Eph 5:22-33). Adultery symbolizes Israel’s spiritual unfaithfulness (e.g., Hos 1–3). God makes his covenants in spite of, not because of, his people’s character (Rom 5:6-11).”
  12. Ezekiel (Protestant academic) “Tyndale House on Ezekiel 23:4: 23:4 Marriage is commonly used in the Bible as a symbol for the covenant relationship between God and his people (e.g., Isa 54:1-8; Eph 5:22-33). Adultery symbolizes Israel’s spiritual unfaithfulness (e.g., Hos 1–3). God makes his covenants in spite of, not because of, his people’s character (Rom 5:6-11).”
  13. 1 Thessalonians (Protestant academic) “Tyndale House on 1 Thessalonians 4:3: 4:3 God’s will is for you to be holy: The foundation of Christian ethics is not philosophical speculation about virtue but doing God’s will (Rom 12:1-2; Eph 6:6; Heb 10:36; 13:20-21). Holiness (1 Thes 4:4, 7) embraces all of a person’s life (5:23); here it involves staying away from sexual sin (Greek porneia, any sexual union outside marriage).”
  14. Ephesians (Protestant academic) “Tyndale House on Ephesians 5:21: 5:21–6:9 Paul gives specific instructions on how believers are to relate to one another in a Christian home (see also Col 3:18–4:1; 1 Pet 2:18–3:7). Love and respect are to characterize all relationships in the body of Christ as an expression of believers’ commitment to the Lord himself. 5:21 And further, submit to one another: The verb form links it with the command to be filled (5:18). This general instruction (cp. Phil 2:3) applies to all three relationships that Paul discusses: wives and husbands (Eph 5:22-33), children and their parents (6:1-4), and slaves”
  15. Deuteronomy (Lutheran) “Keil & Delitzsch on Deuteronomy 22:13: Laws of Chastity and Marriage. - Higher and still holier than the order of nature stands the moral order of marriage, upon which the well-being not only of domestic life, but also of the civil commonwealth of nations, depends. Marriage must be founded upon fidelity and chastity on the part of those who are married. To foster this, and secure it against outbreaks of malice and evil lust, was the design and object of the laws which follow. The first (Deu 22:13-21) relates to the chastity of a woman on entering into the married state, which might be called i”
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