Erasers can be your best friend and be like "Oh hey, you need this erased? No problem, I got you." While other times, they can be like"OH HEY I THINK YOUR PAPER NEEDS A SMUDGE RIGHT HERE, LET ME TAKE CARE OF THAT FOR YOU".
Cool thing to do: Read the ingredients of something a friend is eating then stop midway and ask something like"What is Ar-se-nic? Did I say it right?".