You've probably heard the phrase "Birds of a feather flock together" and that's true when it comes to romance.

你们可能听过一个成语,物以类聚，人以群分“,恋爱还真是这样。

耶鲁公开课 - 心理学导论课程节选

Birds of a feather may flock together but opposites don't really attract each other.

人以群分,反差太大，不容易吸引对方。

耶鲁公开课 - 心理学导论课程节选

"Birds of a feather flock together?"

物以类聚，人以群分“

耶鲁公开课 - 心理学导论课程节选