What You Don't Know Can't Hurt You

A former roommate once told me that what you don't know can't hurt you.  To prove him wrong, I slipped an entire bottle of Miralax into his Gatorade.  When he finally emerged from the bathroom, I told him what I had done and asked if not knowing about it didn't hurt him.  He moved out the next day.  Some people can't admit when they've been proven wrong.