Coming up with a unique and personal tattoo idea isn't easy. You want to pick something that's meaningful but that no one else will have either. That's why we're bringing you an idea you might not have thought of: negative-space tattoos. It's a tattoo concept that uses your skin to make shapes or other images — and is something you might need to see to understand. Check out some examples ahead, and don't be afraid to combine this concept with something you love, like Harry Potter.