I found the term "mad scientist" confusing, as I didn't know that "mad" could also mean crazy, so I was left wondering what all these scientists were so pissed off about.
A childhood belief about speaking

others believed things like this
- I used to believe that scientists were robots and they had some kind of chip in their brain.Anon
- I used to turn the TV off when I left the room so I didn't miss anything.— S.Lee
- I used to believe that the term "being mugged" meant someone beat someone else with a coffee mug.— Matt Thiel
- I thought the term maiden name actually applied to women who were maidens.— Natasha
- i used to think that the term 'necking' referred to boyfriends and girlfriends who rubbed their necks togetherAnon
- I spent ages wondering what a bart ender was as a child without realising that it was actually bar tender.— Heather