When I was about 5, I thought "beer" was a profanity, and (wait for it) smacked a family friend on the lips for saying the word-- I was actually offended! Boy, did he look confused.
A childhood belief about swearing

others believed things like this
- I used to think that Root Beer was beer with less caloriesAnon
- When I was little I believed that when I put lipstick on my lips, the lips grew.— Alba Águila Castelló
- i used to believe that root beer was made with root juice and beer— tm
- When my friend told me her cat was moulting I thought she said melting. I was confused for a while.Anon
- I always thought there was a drinking age for coffee, because it was an adult drink like beer and wine.Anon
- when i was about 7 years old i once thought that chickens had lips. thats it!Anon