[0:00]Why is a tiger's tongue so spiky it could literally make you bleed from a single lick? Now, even though almost all large feliness have these spikes, even your everyday house cat has them. But tigers in particular have unusually prominent ones. What's the point of these spiky spikes? Well, they actually have several uses. The first being that they help with grooming their thick fur, kind of like a brush. They're also used to scrape the bones of their foes clean of meat. If you're wondering what they are made of, just look at your fingernails, as they are made of the same stuff, namely keratin.