What does セックス mean?
セックス is a Japanese noun meaning “sex” in English. It can also be translated as “(one's) sex” depending on context. It is written as セックス in hiragana, and sekkusu in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
今ではセックスの話をすることは顔を赤らめることではなくなった。
Now talking about sex is no blushing affair.