And if the other guy does tidy up, hey the room's clean, Who cares? So either way, you're not going to tidy up and you end up with a typical Yale dorm room.

要是别人打扫完了,屋子干净了,我赚了,最后谁都不去打扫寝室,寝室当然就脏了

耶鲁公开课 - 博弈论课程节选

Or if someone makes a mess in a, in a common area, they are expected to clean up that mess.

如果有人把公用区域弄脏了，那他就要负责打扫干净。

有趣的室友们 - SpeakingMax英语口语达人