1. 性交：sewn 缝制 | sex act 性交 | sex appeal 吸引力

2. 性行为：公司法:Company Act | 性行为:Sex Act | 真实义务:true obligation

noun

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

    Synonym: sexual intercourseintercoursecopulationcoituscoitionsexual congresscongresssexual relationrelationcarnal knowledge