Its what makes us human at the end of the day...the ability to ask why is what makes us who we are as an 'advanced' species.
"Why" is learning from others and its in this learning we are able to gain knowledge and better ourselves and hopefully humanity as a whole.
like when you see a little'n in the shop or somewhere, and they're going through the 'why' stage;
"mamm? why do we have to go shopping?" "maaam? why is the sky blue?" "mamm? why has that man got a beard?"
You can learn a lot about a person by asking 'why' its simple yet gives such positive outcomes, unless ofcourse you ask it very much...example:
my favorite color is orange
because its fun and bright
because thats the...