What Is the Crime of Oral Copulation? Penalties and Defenses

An oral copulation crime is any mouth-to-genital or mouth-to-anal contact that occurs without valid consent, with a minor, or with someone who cannot consent because of unconsciousness, intoxication, or disability. California Penal Code 287 is the statute that defines it, and penalties run from a year in county jail to 14 years in state prison, with federal law reaching up to life for the same conduct on federal land. Every felony conviction also triggers mandatory sex offender registration.¹

What the Law Prohibits

California defines oral copulation as any contact between one person’s mouth and the sexual organ or anus of another person.¹ The definition is strictly anatomical. There is no required duration, no required penetration, and no requirement of any exchange of fluids. A single moment of contact meets it.

The term itself is a California label. Most other states criminalize the identical conduct under broader headings like criminal sexual conduct or sexual assault, and federal law calls it a “sexual act,” explicitly including mouth-to-penis, mouth-to-vulva, and mouth-to-anus contact.²

Consensual oral copulation between adults is not a crime in California. The statute only reaches the act under specific circumstances, and every subsection beyond the definition describes a situation where consent was impossible or where the other person’s will was overcome.

When It Becomes a Crime

Three categories of circumstance turn the conduct into a felony: force or coercion, the other person’s incapacity, and the involvement of a minor.

Force, Fear, or Duress

The offense applies when oral copulation is accomplished through force, violence, duress, menace, or fear of bodily harm.¹ Force means physical power used to compel participation. Menace is a communicated threat of serious, immediate injury. Duress is psychological pressure or implied threats that leave the other person without a real choice. The law also covers threats of future retaliation against the victim or someone the victim cares about, as long as there is a reasonable possibility of follow-through. Submitting to avoid harm is not consent.

Incapacity

The statute reaches cases where the other person was unconscious, asleep, unaware the act was occurring, or unaware of its nature because of the perpetrator’s deception.¹ It does not matter whether the intoxication was self-induced. The question is whether the defendant knew, or reasonably should have known, that the other person could not consent. People with mental disorders or developmental or physical disabilities that prevent them from understanding the encounter receive the same protection, and the defendant does not have to have caused the incapacity for the offense to apply.

Minors

Any oral copulation with someone under 18 is a crime in California, regardless of apparent willingness. Beyond that baseline, the statute tightens as the age gap widens and the victim’s age drops.

California Penalties

Prison exposure under Penal Code 287 depends on which circumstance applies:

Victim under 18, no force: a wobbler, prosecutable as a misdemeanor with up to one year in county jail or as a felony with state prison time.¹
Defendant over 21, victim under 16: automatic felony.
Force, duress, menace, or fear (adult victim): three, six, or eight years in state prison.
Unconscious or intoxicated victim: three, six, or eight years.
Victim under 14, defendant at least 10 years older: three, six, or eight years.
Victim 14 or older but still a minor, accomplished by force: six, eight, or 10 years.
Victim under 14, accomplished by force: eight, 10, or 12 years.
Acting in concert with another person, adult victim: five, seven, or nine years.
Acting in concert, minor victim 14 or older: eight, 10, or 12 years.
Acting in concert, victim under 14: 10, 12, or 14 years.¹

“Acting in concert” covers either personally committing the act with another or aiding and abetting someone else who does. When the victim is a young child and the defendant is substantially older, prosecutors can stack charges for lewd acts on a child under Penal Code 288, which itself carries a three, six, or eight-year term.³ Courts may also impose probation with mandatory counseling, no-contact orders, and restrictions on where the person can live or work.

Federal Law Covers the Same Conduct

Federal law does not use the phrase “oral copulation,” but 18 U.S.C. 2246 defines a “sexual act” to include mouth-to-penis, mouth-to-vulva, and mouth-to-anus contact.² Federal jurisdiction applies on federal land, in federal prisons, on military installations, in Indian country, and in other areas of special federal authority.

Penalties are considerably steeper. Aggravated sexual abuse by force or threat is punishable by any term of years up to life.⁴ When the victim is under 12, there is a 30-year mandatory minimum, and a second conviction for the same offense requires a life sentence. Federal prosecutors also pursue cases where the defendant rendered the victim unconscious or used drugs to defeat resistance, with the same potential life exposure.

Mandatory Sex Offender Registration

Every conviction under Penal Code 287 triggers registration under California’s Sex Offender Registration Act, Penal Code 290.⁵ Since 2021 the state has used a three-tier system that sets the length of registration:

Tier 1, ten years: misdemeanor convictions and felony convictions that are not classified as serious or violent.
Tier 2, twenty years: convictions that qualify as serious or violent felonies, and certain repeat offenses involving intoxicated or disabled victims.
Tier 3, lifetime: forced oral copulation, oral copulation of an unconscious or intoxicated person, and any offense committed while acting in concert.⁵

Registration means reporting personal information to local law enforcement within five working days of moving into a new city or county. That information is accessible to the public through online databases. Failing to register or update information is itself a criminal offense. After the minimum period, tier 1 and tier 2 registrants can petition for removal, but the court can deny the petition based on history and risk.

Consequences That Outlast the Sentence

A felony oral copulation conviction permanently bars the person from possessing firearms or ammunition under federal law, because the ban reaches any crime punishable by more than a year in prison.⁶ Violating that ban is a separate federal offense.

For noncitizens, the immigration fallout can be catastrophic. Federal immigration law classifies “rape” and “sexual abuse of a minor” as aggravated felonies.⁷ An aggravated felony triggers mandatory deportation and bars nearly every form of relief that might otherwise stop removal. Lawful permanent residents are not exempt. A person deported after an aggravated felony conviction who re-enters without permission faces a lengthy federal prison sentence.

Professional licensing boards in fields like healthcare, education, law, and finance commonly treat a felony sex crime as an automatic bar. The combination of a felony record and sex offender registration also makes passing routine employment background checks difficult, and many landlords screen for sex offenses, which combines with residency restrictions to narrow housing options.

Consent and Defenses

Genuine consent between adults is a complete defense. The legal concept has sharp edges, though. Silence is not consent. The absence of resistance is not consent. A person who freezes out of fear has not consented, even if they never said no. Consent to one act does not carry over to a different act, and consent can be withdrawn at any point; continuing after that becomes a crime from that moment.

A defendant may argue a reasonable mistake of fact: that they genuinely and reasonably believed the other person consented. The jury decides whether the belief was reasonable, and the prosecution only has to show that a reasonable person in the defendant’s position would have recognized the lack of consent. Past sexual history between the parties does not establish consent for a later encounter.

For charges involving minors, consent is not a defense at all. A minor cannot legally consent to oral copulation, and a defendant’s belief that the minor was an adult is a difficult argument to sustain.

How Long Prosecutors Have to File Charges

Many California felony sex offenses have no statute of limitations when they involve force or minors, which means charges can be filed decades after the conduct. Federal sex offenses also carry extended or eliminated limitation periods, particularly when the victim was a child. Someone who committed the offense years ago is not necessarily beyond the reach of prosecution, and the trend in both systems has been to expand these windows as DNA evidence has made old cases chargeable.

1
California Legislative Information. California Code PEN 287 – Oral Copulation
2
Office of the Law Revision Counsel. 18 USC 2246 – Definitions for Chapter 109A
3
California Legislative Information. California Code PEN 288 – Lewd or Lascivious Acts With Child Under 14
4
Office of the Law Revision Counsel. 18 USC 2241 – Aggravated Sexual Abuse
5
California Legislative Information. California Code PEN 290 – Sex Offender Registration Act
6
Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts
7
Office of the Law Revision Counsel. 8 USC 1101 – Definitions