If a dog jumps into your lap, it is because he is fond of you; but if a cat does the same thing, it is because your lap is warmer.

If a dog jumps into your lap, it is because he is fond of you; but if a cat does the same thing, it is because your lap is warmer.

如果一只狗跳到你的腿上，那是因为它喜欢你;但是如果一只猫也做同样的事情，那是因为你的膝盖更暖和。

-- Alfred North Whitehead 阿尔弗雷德北怀特黑德