I tell you your wants and needs; I am one of three. Remove my first and last, and there is nothing left to see.

I am taught without a teacher, born without a womb. I feast on old thoughts to fashion something new. I speak your tongues, mimic your hand, and paint without paint, I learn by guessing patterns, not by feeling faint. What am I?

Riddle me this batman, who sells me doesn’t want me, who buys me doesn’t use me and who uses me hasn’t a clue.

The more you share me, the more I shrink. But if you keep me, I remain the same.

I resemble myself at many scales. My edge can grow without bound while my space stays bounded. You’ll find me in nature, but only across a finite span of sizes.