sexual relations

plural plural-only

The act of sexual intercourse. / Sexual activities between individuals.

Japanese Meaning

性的関係 / 性行為

The study examined how education influences attitudes toward sexual relations among young adults.

その研究は、教育が若年成人の性行為に対する態度にどのように影響するかを調査した。

Sense（1）

The act of sexual intercourse.

I did not have sexual relations with that woman, Ms. Lewinsky.

Sense（2）

Sexual activities between individuals.