You feel physiologically aroused but you're not completely sure why, and you have to make up an explanation for it.

你感觉到性觉醒,但是不能确定是什么原因，你不得不给出一个解释。

耶鲁公开课 - 心理学导论课程节选

I'm sure some of you feel that too.

你们有些人应该也有这感觉。

哈佛公开课 - 幸福课课程节选