Answer:
Crooked as a rainbow and slick as a plate, ten thousand horses can't pull me straight. What am I?
What do you call a pig that is no fun to be around?
An action done on mosquito bites
No matter how little or how much you use me, you change me every month.
I am the reaction after enjoying soda.
As round as an apple. As deep as a cup. All the king's horses can't pull it up.