他们互相为对方背诵诗歌。

They recited poetry to one another.

《柯林斯英汉双解大词典》

或者用它们轮流为对方按摩。

Or take it in turns to massage each other.

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有了孩子以后，要确保为对方留出时间。

Make sure you reserve time for each other after you have kids.

youdao

And then should it surprise us that that's the kind of person who would call a perfect stranger on the telephone and write a sexy story and give it to them? Right?

我们是否应该感到吃惊呢,正是这类人会为给一个陌生人打电话,并为对方写一个性感小故事？

耶鲁公开课 - 心理学导论课程节选