A glass of cider joke

A little girl cuts her hand on the playground and runs crying to the teacher. She asks the teacher for a glass of cider.

"Why do you want a glass of cider?" the teacher asks.

"To take away the pain," sobs the little girl.

"What do you mean?" the teacher asks.

"Well," sobs the little girl. "I overheard my big sister say that whenever she has a prick in her hand, she can't wait to get it in cider."