Slippery slopes

Sexual morality

• If contraception is acceptable, why not same sex marriages? Sterile sex is sterile sex; all that matters is pleasure (hedonism).
• If same sex marriages are acceptable, why not polygamy (multiple wives)? It's a natural arrangement in many human cultures (most especially in Islam and Mormonism).
• If polygamy is acceptable, why not polandry (multiple husbands)? Some tribes allow this.
• If polygamy and polyandry are acceptable, why not polyamorous marriages (any combination agreed to by the partners)? It's all a private matter; the state has no interest in what happens between consenting adults behind closed doors.

• If polyamory is acceptable, why not swinging (couples engaging in sex with multiple partners)?

• If it is legal for same-sex couples to adopt children, why not same sex marriage?

• If contraception in marriage is acceptable, why not prostitution?
• If contraception in marriage is acceptable, why not incest?

See also the article on the crisis of chastity in our culture.

Abortion

• If abortion is a right, what right do doctors have not to provide abortions?
• If abortion is a right, what is wrong with infanticide? Diagnosis of birth defects and murdering the child are both easier once the baby's body is extracted from the mother's body.
• If abortion is morally acceptable, what's wrong with breeding babies to provide body parts for adults?
• If abortion is morally acceptable, what's wrong with using the unborn human being as a lab rat? What's wrong with running experiments on the unborn, then murdering them in the womb?

Euthanasia

• If humans have a right to die, then what right do doctors have not to murder them?