g string - A letter that looks like a Y, and it became a piece of under

A letter that looks like a Y, and it became a piece of underwear. It’s like a dumb name for a smart idea.

My teacher said the g string was named after a letter that looks like a Y.

I asked why it was called a g string, and the answer was dumb.

My friend said the g string was the dumbest name ever, and I agreed.