Linda and Jill were chatting over coffee.

Said Linda, "I've been experiencing a strange and painful side effect from coffee. I'm fine when I drink it black, but if I use cream, or sugar, or both, I get a stabbing pain in one eye."

Linda took a sip of her coffee. "Oww!" she cried. "There it goes again!"

Said Jill, "Take the spoon out of the cup."