Cider

A little girl came running into the house bawling her eyes out and cradling her hand: " Mummy, quick! Get me a glass of cider! " she wailed.
" Why do you want a glass of cider? " asked her mum.
" I cut my hand on a thorn, and I want the pain to go away!" Confused, but weary of the child's whining, the mother obliged and poured her a glass of cider. The little girl immediately dunked her hand in it.
“ Ouch! It still hurts! This cider doesn't work! " she whined.
" What are you talking about? " asked her increasingly perplexed parent,“ Whatever made you think that cider would ease your pain? "
" Well, I overheard my big sister say that whenever she gets a prick in her hand, she can't wait to get it in cider "