Q

Why is Fatty sleeping with his mouth open?
费提（胖子）睡觉为什么嘴巴张着？

A

Because his skin is so short that when he shut his eyes his mouth opens.
因为他的皮肤绷得紧，眼皮一闭，嘴皮就要张开。

点睛一笔

fat作为形容词，意思是“肥的，胖的”，fatty是其名词，意思是“胖子”。本题答案“Because his skin is so short that when he shut his eyes his mouth opens.”并无科学依据，亦无针对性，只是开玩笑而已。