Although you can’t see them, they’re everywhere. They’re on everything you touch, everything you eat, and they even live inside of you…by the millions. What are they? They’re bacteria, and without them we would all die. But wait, aren’t bacteria the bad guys? Well, yes, in many cases they are. Bacterial infections kill countless people every year, but that doesn’t mean they are all inherently bad. This is because their lethality at least partially depends on where they are inside your body. For example, while your guts are teeming with E. coli that help you digest your food, it’s when they get your bloodstream that you have a problem. So, just remember as you read through this list of the 25 dirtiest things you touch every day that sometimes a little bit of dirt might actually be good for you.