有这10个“坏习惯”，那可能是因为你聪明！

一身恶习肯定不利于身心健康和个人发展，但有点小毛病也未必是坏事儿。比如，研究证明，爱迟到的人往往比较乐观，习惯做最好的打算；桌面凌乱的人可能更有目标；偶尔走神可以提高工作效率等等。

拥有下面这些小毛病不仅无伤大雅，而且可能还对你有好处。

1. Procrastinating
拖延症

There's a growing body of literature dedicated to why people procrastinate - and how to stop it.
关于拖延症成因以及治疗方法的研究文献越来越多。

But Wharton professor Adam Grant argues that we should expand our conception of procrastination to include not just laziness, but also waiting for the right time. In other words, procrastination can help boost creativity because you give yourself a chance to develop your big idea.
但沃顿商学院教授亚当•格兰特认为，我们应该认识到，拖延症不仅仅是懒，也是在等待正确的时机。换句话说，拖延症有助于提升人们的创造力，因为你给了自己空间去想出好主意。

2. Biting your nails
啃指甲

Researchers followed about 1,000 kids starting when they were five years old. When the kids were five, seven, nine, and 11, the researchers asked their parents whether they bit their nails or sucked their thumb. About one-third of the kids displayed one or both habits.
研究人员们从5岁开始对约1000名儿童进行了追踪研究。当孩子们处于5岁、7岁、9岁和11岁时，研究人员询问这些孩子的父母，他们是否会咬指甲或嘬手指。约三分之一的儿童有至少其中一种习惯。

When the kids were 13 and then 32 years old, the researchers performed allergy tests. Sure enough, the group that had habitually bit their nails and/or sucked their thumb as kids were less likely to have developed allergies.
当这些孩子长到13岁和32岁时，研究人员对他们进行过敏测试。结果发现有咬指甲或（和）嘬手指习惯的孩子，更不容易过敏。

At the same time, one of the study authors advised parents not to encourage nail-biting or thumb-sucking in their kids.
与此同时，该论文作者建议父母们不要鼓励孩子们咬指甲或者嘬手指。

While nail-biting doesn't typically cause long-term damage, it can damage the skin around the nail, making you more susceptible to infections. Meanwhile, if thumb-sucking continues past when a kid's permanent teeth come in, it can change how the teeth line up.
虽然咬指甲不会造成长期损伤，但会破坏指甲周围的皮肤，让人更容易感染。此外，在换牙之前嘬手指会影响牙齿的排列。