Here are the core reasons, clearly broken down:

1. Consent must be ongoing and freely given
Consent isn’t a one-time agreement you give when you say “I do.” It must be:

• voluntary
• enthusiastic
• specific
• revocable at any time

Someone can consent yesterday and say no today—even within marriage.

2. Marriage does not transfer ownership of a body
Marriage is a partnership, not ownership. No spouse gains permanent sexual access to the other. Each person remains an independent human being with bodily autonomy.

3. Coercion invalidates consent
If someone feels pressured because of:

• obligation (“you’re my spouse”)
• fear (emotional, financial, or physical)
• guilt, religion, or manipulation

that is not consent, even if no physical force is used.

4. Desire can change—and that’s normal
Health, stress, pregnancy, trauma, hormones, mental health, and life circumstances all affect desire. Being married doesn’t freeze attraction or capacity at a fixed level.

5. Modern law recognizes marital rape
Historically, marriage was wrongly treated as permanent consent. Today, most legal systems recognize that rape can occur within marriage because consent still matters.

6. Love and intimacy require mutual willingness
True intimacy is built on trust and safety. Sex without consent—even between spouses—damages emotional connection and can cause long-term harm.

7. “Duty” language is dangerous
Framing sex as a marital duty turns intimacy into an obligation rather than a choice. Healthy relationships center mutual desire, not entitlement.

In short:
Marriage is a commitment to care, respect, and partnership—not a blanket permission slip. Consent is personal, present, and changeable, regardless of relationship status.