Sexual Ethics - Applying religious ethical theories

Natural law and sexual goods

Natural law evaluates sexual choices through the goods and purposes of human nature, rather than through pleasure or consent alone.

Aquinas connects practical reason with a God-grounded moral order. The primary precepts include reproduction, education of children and ordered social life. Applied to sex, a traditional natural-law argument connects the generation and upbringing of children with a stable marital union, and judges particular acts by whether they respect that ordering. Consent matters, but cannot on its own make an act consistent with the relevant goods.

The reasoning can be reconstructed in steps. Human goods give purposes moral significance; sexuality is directed towards generation within responsible social relationships; sexual conduct should respect these goods rather than deliberately frustrate them; therefore a relationship's immediate pleasure is an incomplete test of rightness. Each step matters. Moving straight from 'sex can cause reproduction' to 'every non-reproductive act is wrong' leaves the moral premise and the permitted form of action undefended.

Catholic development gives the unitive and procreative meanings a connected role. Humanae Vitae 12 does not require every marital act actually to produce a child. Age or infertility differs, on that account, from intentionally excluding the act's procreative ordering. A critic may still question the distinction's moral force, but must not refute the theory through a requirement it does not impose.

A strong challenge asks whether reproductive function determines the morally permissible use of a capacity. Sexual intimacy can express companionship and mutual support as well as reproduction. A natural-law reply is that those goods should be integrated rather than detach sexuality from its whole ordering. The debate therefore concerns the right relationship among goods, rather than whether companionship or children matter at all.

Natural-law judgements across the cases

Applying the same natural-law standard to different cases reveals both its stability and the inferences that critics dispute.

For premarital sex, the traditional argument is that sexual union should express a marital commitment adequate to its personal and family responsibilities. A caring unmarried couple may reply that their relationship already provides stable commitment. The defender must explain why marriage supplies a morally significant structure that private intention does not, rather than assert that unmarried people cannot care.

For extramarital sex, a secret affair attacks fidelity and the ordered relationship owed to a spouse. In an original case, an adult promises exclusivity and secretly begins another relationship. Trust and the spouse's informed agency are compromised even if the agent gains pleasure. A natural-law judgement opposes the chosen betrayal as inconsistent with marital and social goods. If a marriage is harmful, that supplies reasons to seek protection and resolve it; it does not automatically make deception a good means.

For same-sex sexual relationships, the traditional natural-law objection concerns their inability to realise the kind of procreative sexual union it regards as properly ordered. This is not the assertion that the persons lack dignity, affection or social value. An inclusive critic argues that committed same-sex couples can realise companionship and caring responsibilities, including raising children, and questions whether the procreative act type should govern their moral status. The defender distinguishes caring for children from the procreative ordering of the act. Explaining that distinction identifies the dispute but does not establish its moral authority without further argument.

Natural law offers a common standard beyond changing preferences and can defend fidelity against convenient exceptions. Its difficulty is showing that its account of purpose yields the disputed prohibitions without undervaluing other goods. Double effect cannot make a chosen sexual act acceptable merely because it has a good further aim: the act itself must satisfy the account of permissible means.

Agape across the cases

Situation ethics evaluates a sexual choice by whether it best serves agape in the actual circumstances, while refusing to equate agape with sexual attraction.

Fletcher's agape seeks the neighbour's good regardless of liking. Personalism puts persons at the centre; pragmatism demands a workable response; relativism makes other rules relative to love; positivism accepts love as the governing commitment. Justice as love distributed requires considering everyone affected. None of these principles reduces the judgement to 'the partners want it'.

For premarital sex, a situationist asks about commitment, mutual understanding, vulnerability and likely effects. An original case of two informed adults in a caring, stable relationship may support a permissive judgement if their choice serves both persons' good. A case involving pressure or incompatible expectations changes the judgement. Marriage is not an automatic permission and unmarried status is not an automatic prohibition.

For extramarital sex, a secret affair is normally opposed because deception harms a spouse, trust and others affected. Nevertheless, situation ethics has no independent absolute prohibition on an act type when a genuinely more loving outcome requires it. That radical possibility needs a demanding comparison of alternatives and all affected persons. Calling an affair compassionate while ignoring betrayal or possible honest resolution is self-serving reasoning, not an application of agape.

For a same-sex relationship, orientation alone does not determine the verdict. The same criterion of faithful, non-exploitative concern applies. A loving relationship can be supported; an exploitative one opposed. A critic argues that flexible judgement weakens stable protections or gives decision-makers too much power to define another's good. The situationist replies that informed choice, impartial concern and honest attention to consequences constrain the decision. The reply supplies standards, while uncertainty and disagreement remain real limits.

Comparing the guidance

Theories can agree about a sexual decision while disagreeing about the reason that makes it right or wrong.

Both natural law and situation ethics can oppose a deceptive affair. Natural law treats betrayal as contrary to the goods constitutive of marriage and social life. Situation ethics judges it through the harm to persons and its failure to distribute loving concern. If unusual facts really made an extramarital act the most loving available choice, the theories could diverge because their standards differ.

For a faithful same-sex or unmarried couple, the disagreement is often sharper. Traditional natural law can reject a sexual act despite evident affection because its act type does not fulfil the claimed ordering. Situation ethics can support it if agape is served. The issue is not one side loving people and the other ignoring them, but whether stable purposes constrain permissible means or loving outcomes govern them.

A qualified conclusion can value natural law's treatment of fidelity while rejecting its exclusive procreative interpretation. Another can defend situation ethics' responsiveness while arguing that fixed consent and honesty protections are needed. A defender of either theory should show how its own resources answer that concern. The comparison is useful when it identifies a decision, a governing reason and the precise condition on which that reason may fail.