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
双语例句
Almost half said they go without condoms when having vaginal sex. 近一半的人说在进行阴道性交时不使用避孕套。
He could be infected by having sex with an infected woman. 他可能因与受感染的女人性交而被传染上疾病。
