Why does Kirsti come home in tears?

Kirsti comes homes in tears because her mother has just bought her a new pair of shoes. Unfortunately, the shoes are made of fish skin.....

"I won't!" Kirsti sputtered. "I won't ever, ever wear them! Not if you chain me in a prison and beat me with sticks!"
Annemarie giggled and looked questioningly at her mother. Mrs. Johansen sighed. "I bought Kirsti some new shoes," she explained. "She's outgrown her old ones."

"Goodness, Kirsti," Ellen said, "I wish my mother would get me some new shoes. I love new things, and it's so hard to find them in the stores."

"Not if you go to a fish store!" Kirsti bellowed. "But most mothers wouldn't make their daughters wear ugly fish shoes!"