Here's a mind=blown thought. There *really* no ''two'' of
   anything.

   Apples. You get an apple and another apple. In a sense, you have
   two apples. But - they're not the same. They're in two different
   points in space. They're different shapes, slightly. Their
   molecules and atom and subatomic things are moving in different
   ways.

   We just call it ''two'' for OUR human convenience, because we
   like patterns. They are well traveled roads in our brain that
   are comforting, so we put them into a 'category'.

   But one apple may be sweet and the other may have worms on the
   inside, making them quite different.

   So really, there's only 2 or more of something because humans
   are really BIG and miss a lot of details and our brains tend to
   stereotype things... and... people.