Why Do Guitars have Tuning Pegs?

Why do stringed instruments have tuning pegs?

To keep the strings from tangling
We peg them in their places.
Or else they’d drag across the ground
like bad behaved shoelaces.

The other ends we twist ’em tight!
around each tuning post
well not too tight- but just enough-
to E A D G B and E at most.

“But some guitars have more” you say!
And that, my friend is true.
But six or seven or ninety-nine
you’ll make them all sound extra fine
if you can keep them all in line-
that’s what your pegs will do!

For a guitar student, All obstacles become stepping stones