My 8 and soon-to-be-6 year old sons love playing a game with me. They know I loath spiders, so they ask me questions like "Would you rather sleep in a spider cave for one night or eat a sheep's brain?" or "Would you rather spend a night in a spider cave or break a finger?" Inevitably, I choose the non-spider option, and today I ran across exactly why.
Imagine yourself in a dark cave full of spiders and you light a match and this is what you see (pretend that's your arm or leg):