When something is intuitive, you don't have to "think about it" for it to work.

At the Exploratorium, there's an exhibit where you have to time the firing of four leg muscles to make them turn a bicycle wheel.

It's nearly impossible, but using our legs to turn a real bicycle wheel is something we could do any day without thinking.

Watching my 2 year old son try to learn how to pedal his tricycle underlines how non-intuitive it is to start.

But once you successfully get it going, it feels like the most natural thing in the world, something in your muscle memory, in your bones, something you don't need to spend any cycles thinking about: it's intuitive.

A thing that has become intuitive for you is something that is hard to teach to others, because you can't consciously access the knowhow to explain it, you only know the feel of it.