Old panties

Why? Sandry found herself wondering. Out of her entire underwear drawer, including several newer and sexier pairs, today she had absentmindedly put on a pair of white panties decorated with pink cartoon piggies, which had been sitting in the back of her drawer for at least five years. The material was worn threadbare and stretched tightly enough across her rear to distort some of the pigs wider.

"No!" she groaned, listening to laughter and pig noises from students behind her.