I thought that children were not allowed to go to baby showers or wedding showers because it was an adults only event where they literally took showers together.
A childhood belief about marriage

others believed things like this
- When I was a kid I took two showers becaue I thought my hair was a plant and needed the water to grow— Tim
- I was convinced that children weren't humans, only adults were, children were a total different race!— Leda
- That adults came into the world as adults and were never childrenAnon
- I used to believe that having children could only happen after a wedding with the person you are married to.Anon
- I used to believe untill I was five that all adults are born like that and all little children stay little— Igor
- I used to believe that some first names were specifically for children and some were specifically for adults.— Marco