How do you say sex in Korean?
— 성 (seong); 성별

Specialized synonyms for sex in Korean
homosexuality동성애 (tongseonge)
love연인 (yeon-in) 자기 (jagi: 'colloquial')
pleasure쾌락 (kwaerak)
Generic synonyms for sex in Korean
family가족 (kajok)
Attributes for sex in Korean
female여성 (yeoseong)