You are playing Russian roulette every time you have unprotected sex.

每次你进行无保护措施的性爱都是在冒不可预料的风险。

The majority of sex offenders have a low opinion of themselves.

大多数性犯罪者自我评价都很低。

You have a choice of coed or single-sex swimming exercise classes.

你可以选参加男女混合或是非混合的游泳练习课。

Some American parents argue that the vaccine will make their girls more likely to have sex early.

VOA : special.2009.04.01

And,like birds they have a single opening with which they produce eggs, have sex and expel waste.

VOA : special.2009.07.07

The Acts of the Apostles doesn't have sex.

使徒行传不涉及性。

新约课程节选 : 耶鲁公开课

Girls are advised to begin testing within three years of when they first have sex, or in any case no later than twenty-one.

VOA : special.2009.11.25

Spontaneity is great, but 80% of married couples schedule time to have sex, says Dr. McCarthy preferably when not dead tired.

WSJ: How to Talk to Your Spouse About Improving Your Sex Life

Men want someone who will take care of them, make them look good, and have sex with them not necessarily in that order.

NEWYORKER: Looking for Someone

Fourteen provinces mostly in the east and south have sex ratios at birth of 120 and above, and three have unprecedented levels of more than 130.

ECONOMIST: Gendercide