I thought that "Oh, the humanity!" was an exclamation meant for pointing out that something was very humanlike.
A childhood belief about speaking

others believed things like this
- I thought that exclamation marks were actually "explanation marks", since they explain how you pronounce it.— superoid
- Street signs with the upward pointing arrow was for airplanes. — Tammy
- I used to believe that a half moon was gods finger nail, and his finger was pointing downwards.— clo
- i used to believe that sex meant love and that having sex meant the two people would live happily ever after.— amy
- I thought "catkin" meant "little cat".Anon
- I thought if food said it was fat free it meant you could eat as much as you want without getting fat!— Brainhead