You people who can do this are surely gifted!
My IQ must be quite low or i may be somebody who uses only the left or right side of my brain? I dunno. Lol xD
It's not easy at all to solve the cube with spatial skills.
Most people memorize a couple moves that get the pieces where they need to go.
Though the first half of the cube can be done with a little intuition, the rest requires knowing key moves.
Then, there is the hardest way, Heise's method. This one is hard even for people who can solve a cube no problem. I'm trying to learn this method currently but I haven't found a very good guide or explanation as to how it is done.