“You, a grown adult, are afraid of the dark. Explain why this is a legitimate concern, so friends won’t laugh at you.” All right, so this is the reason I’m scared of the dark. Now obviously I don’t tell anybody about this, because I’m a grown-ass man. I should know better, right? But you all have your childish fears too. Some of you are afraid of showers or tunnels. If you think about it, there’s no reason to be scared of spiders. There are three thousand species of spiders in North America and only two are poisonous. Two! Only four people die from spider bites per year. When you take…