性行為

(1)the act of sexual procreation between a man and a woman; the man's penis is inserted into the woman's vagina and excited until orgasm and ejaculation occur

(2)男性と女性の間の性的な出産の行為

(3)オルガスムと射精が起こるまで、男の陰茎は女性のちつに挿入され、刺激される

(4)activities associated with sexual intercourse; "they had sex in the back seat"

(5)性交に関連した行為

(1)