I think as kids, we all wanted a twin. It was basically a built-in best friend! Although, if you know someone who actually does have a twin, they'll probably tell you otherwise. Imagine, though, if you found your twin in a totally random place! And they were a complete stranger!
With billions of people in the world, it's not inconceivable to believe there is someone identical to us somewhere on Earth. Chances are, you'll never never meet that person. But these people were lucky enough to meet their non-biological twins and it's actually pretty crazy!