Have Sex: Meaning, Usage, Health Contexts, and Examples

have sex — a neutral verb phrase meaning to engage in sexual activity, often specifically sexual intercourse, between consenting adults.
Pronounced /hæv sɛks/ (hav seks).

Easy explanation

Have sex is the plain, respectful way to say two adults engage in sexual activity. It’s widely used in health, education, and news because it is clear and not crude.

Part of speech and grammar

Verb phrase:have + sex; tenses as with have: has/had/having sex.
Partner pattern:have sex with [someone].
Modifiers:consensual/protected/safer sex; unprotected sex; vaginal/anal/oral sex; casual sex; premarital sex.
Countability:sex is uncountable in this phrase (have a sex ✗).
Formality: adding sexual (have sexual intercourse) makes it more clinical.

Register and tone

Plain, neutral, and appropriate in most contexts where sexual activity must be named without slang. Preferable to crude terms in professional or public writing.

Connection to sexuality

Directly about sexuality. The phrase should always imply consent, mutual respect, and legality. Where clarity matters (medical, legal), specify type (e.g., oral sex with barriers).

Common collocations

have sex with [partner]
have protected/safer sex
have unprotected sex
have sex after/before [event]
have sex during pregnancy
first time having sex
decide not to have sex
have casual sex
have sex regularly

Idioms and set phrases

have sexual intercourse, have sexual relations, safe sex/safer sex, sex life (related noun phrase)

Prepositions and nuance

with [someone] — names the partner: had sex with a long-term partner.
without [protection/consent] — absence; without consent is criminal and should be named as such (e.g., rape), not as “sex.”
during/after/before [time/condition] — timing/health: sex during pregnancy (if approved by a clinician).
for [reason] — motive (informal): didn’t have sex for the wrong reasons.

Word comparisons

make love — romantic, tender tone.
sleep with — common euphemism; neutral in journalism.
be intimate — can be sexual or emotional; add physically/emotionally for clarity.
have intercourse — clinical/formal.
hook up — casual social framing.
get laid / bang — slang or vulgar; avoid in respectful contexts.

Real-life examples

They chose not to have sex until they’d discussed boundaries and testing.
Public health campaigns teach how to have safer sex with barrier methods.
The survey asked whether respondents had sex in the previous month.
After surgery, patients should ask when it’s safe to have sex again.

Sample sentences

We agreed to have sex only after we both felt ready and informed.
They’ve decided to have sex with protection until test results come back.
The booklet explains pain during sex and when to talk to a clinician.
It’s fine to say no and not have sex; consent is ongoing.

Synonyms

have sexual intercourse, have intercourse, sleep with, make love, be intimate, engage in sexual relations, copulate, hook up

Antonyms

abstain, practice celibacy, remain platonic, refrain, say no

Related terms

consent, contraception, barrier methods, condoms, dental dam, PrEP, STI prevention, testing, lubrication, aftercare, boundaries, monogamy, open relationship

Notes and etiquette

Use explicit, people-first wording when consent or safety is at issue (e.g., nonconsensual sexual act = rape/assault). Avoid slang in professional settings. Specify type of sex when medically relevant, and center mutual consent and dignity.

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