What weird false belief did you have as a kid?

When I was young and hanging with my great aunt's church friends, we were walking to the store. I went to link arms with my great aunt and her friend was like, "Hey, that's dangerous. You can't defend yourself. Someone could jump you." From that point, I assumed that anyone who was linking arms was, like, giving a show of dominance. Like, "Yeah, we're linked up, because we can still take anybody even with only one arm." Didn't change that mindset until I was in middle school after I tried to explain to my friend how dangerous walking with her boyfriend was because "how would they defend themselves." 🙃