Where went why?

That why impulse of early youth,
The fundamental key of curiosity:
Does it degrade with each lost
Baby tooth; grow wary of the adult
World of Weary, this now, oh, so-
Needed, though least sought of
Queries? Straight to how and what
And who and where – the why forgot
– the minds of men hop-skip right on
To which and when and then and
There, the reason stops and critical
Thought dies of inattention by the
Why that rarely even gets a mention..