sex

All you see on TV is sex and violence these days.

如今在电视上看到的尽是性和暴力。

They had sex in the back seat of his car.

他们在他的汽车后座上做了爱。

She no longer wanted to have sex with him.

她再也不想和他做爱了。

the dangers of casual sex

性关系随便的危险性