sexual behaviour
性行为
They were not having a sexual relationship at the time.
当时他们之间并不存在性关系。
Her interest in him is purely sexual.
她对他感兴趣纯粹是因为性的原因。
sexual orientation(= whether you are heterosexual or homosexual )
性取向（指异性恋或同性恋）
the sexual organs(= the penis , vagina , etc.)
生殖器官
sexual reproduction
有性繁殖
sexual characteristics
性别特征
1.性的;有性别的
2.性欲的
3.生殖的;【生】有性的
1.involving or relating to sex
2.concerning relationships between men and women, or the way that people think men and women should behave
3.involving the joining of male and female cells
1.If any sexual behaviour is out of tune with the natural world, it is surely that of the priesthood.
如果有任何和这个自然界唱反调的性行为，那无疑就是这种天主教的僧侣生活。
2.But said after they are in a sexual relationship, it brings with it the promise of commitment and a potential father to any child.
不过，假如男人在他们发生性关系后再表白，这意味着承诺，并可能成为孩子的父亲。
3.On her mistress's death, Jacobs was sold to a white master who tried to force her to have sexual relations.
女主人去世后，她被卖给一个白人奴隶主。奴隶主试图强迫与她发生性关系，她奋力进行了抵抗。
4."Porn and sexual addiction has always been referred to as a man's problem, " says Renaud.
“色情和性上瘾一直被指认为是男人的难题，”李纳德说。
5.Wynne's mother paraded naked in front of him and would tell him, as a child, of the intense pleasure she got from sexual intercourse.
当韦恩还是一个孩子的时候，他妈妈在他面前展示她的裸体，并会告诉他她从性爱中获得的强烈快感。
6.In other words, Paul is addressing ALL deviant sexual and immoral behavior, not just that of a same-sex variety.
换句话说，彼时的保罗在解决所有的性越轨和不道德行为，而不只是各种各样同性恋的问题。
7.Make the first move. If you and your partner have reached a sexual stalemate, one of you will have to make a move.
如果你和你的配偶陷入了性生活的僵局，你们中的一个必须首先行动。
8.You know your mind is occupied with something or other, psychological sexual pictures, psychological demands and all the rest of it.
你知道你的头脑正被某物或者其他东西，心理上的性图片，心理上的要求以及其他所有这些所占据。
9.SEXUAL allure is often hinted as being the prize for buying this or that.
性诱惑常常被暗示成买东买西的嘉赏。
10.It wasn't sexual at this point, but I had a deep emotional connection with him.
这不是性在这一点上，但我与他进行了深刻的情感联系。