And so do rats.
Wikipedia "Everyone goes to sleep eventually."
Sure, we all know that rats will take a few bites from corpses. (Thanks, CSI! That and "semen on everything." That's all we took away from your show.) But that's just because they're scavengers, right? Rats aren't picky when it comes to their food sources, everybody knows that. But that's not entirely true. There is one thing rats seem to love more than anything else, and given the chance they will risk everything to get it again and again: your blood.
They're basically a bunch of furry little vampires that live in your walls. A 22-year study of urban rat bites found that the most common time to be bitten was between midnight and 8 a.m., while sleeping peacefully in your own bed, unaware that a huge, diseased rodent was chewing on your face. Oh, and that's not hyperbole, either: Rats most commonly go for the face and hands.
Wikipedia This is why you don't teach them to sit on your shoulder. Or gnaw on your ears.
But this is like spiders, right? They might bite you once or twice, but it's either in self-defense or desperation. It's not like they routinely prey on human bei- of fucking course it's like that. Haven't you been paying attention to this article? Once someone is bitten by a rat, their chances of being bitten again dramatically increase.
But ... but why? If it's not defense, and there's plenty of other food, why on earth would they do it?
We actually told you the answer already. It's just that the part of your brain responsible for keeping anxiety in check told you it was a joke. Rats will repeatedly attack the same victim because they seriously and literally want your blood.
In 1945, Professor C.P. Richter did a study to see what exactly attracted rats to humans. He gave a group of rats access to a large quantity of blood, and found that within 24 hours they had consumed it all, even though it was four times as much "food" as they would normally eat in a day. Richter's actual, word for word scientific conclusion: "[Rats can develop] a real craving for fresh human blood."
You think you can pacify them with milk, but when rats have their own temple, you know it's only a matter of time.
And, it bears repeating, these are the things that might be climbing up your toilet right at this very moment. Soooo ... might be time to invest in a good, solid, waterproof safe, eh?
For more animals we need to annihilate, check out The 5 Most Horrifying Bugs in the World and 6 Animals Humanity Accidentally Made Way Scarier.