Double Trouble

I'm taking Friday off, and I announced it to my first period class today.

"I requested the meanest sub available," I told them.

"Oh, then it must be your twin sister, Ms. Flower," one little smarty replied.

"YOU HAVE A TWIN???" one little bundle of joy shouted.

"Yes," I said. "We are identical. Sometimes she teaches for me, and you don't even know it."

It took him the rest of the class period to figure out why everybody else laughed.