This was the first sexual relationship I'd had.

这是我第一次与人发生性关系。

Many marriage troubles spring from unsatisfactory sexual relationships.

许多婚姻问题都源于不如意的性关系。

incidents of domestic violence and sexual assault.

家庭暴力和性侵事件。

Women's groups denounced sexual discrimination.

妇女组织谴责性别歧视。

couples of all sexual persuasions.

有各种性取向的情侣们。

Girls generally reach sexual maturity two years earlier than boys.

女孩通常比男孩早两年达到性成熟。