Here's another example: When I look at something I "see" the functionality behind it (for example the pipes in the bathroom), or the chemical reaction, or sometimes even the concept of the atoms that make it up.

An interior designer will see the colors, and the layout and how the things go together or don't. I don't see that, and in turn the designer does not see what I see.

So never mind the physical senses, even on a mental level two people do not see/experience the world the same way.