noun, noun or participle which takes 'suru', intransitive verb
A direct but not inherently vulgar word for sexual intercourse. As a suru verb, セックスする means “to have sex.”
二人は付き合ってからしばらくしてセックスした。
The two had sex after they had been dating for a while.
安全なセックス
It is important to talk with your partner about safe sex.
noun
Used for sex or gender as a category, especially in contexts that contrast セックス with ジェンダー. In everyday forms and identification, 性別 is usually the more natural Japanese word.
社会学では、セックスとジェンダーを分けて考えることがある。
In sociology, sex and gender are sometimes considered separately.