This is more my mom's than mine. Once her mother asked her to go to the store to buy napkins, and she went to the back of the store and picked up sanitary pads (this was before she knew what a period was, and it wasn't talked about much). The cashier asked her if she wanted a bag and she was confused as to why. So she walked all the way home with a package of pads, and her mom sent her back to the store, and the cashier just laughed.
She's embarrassed about it to this day.
A childhood belief about periods

others believed things like this
- pizza hut made their pizzas in a tiny hut out back of the store
Anon - I used to think that my mom had to buy ice cubes from the store and bring them home to fill up the trays.— Shawna
- I thought pads sucked blood from women. It wasn't until later in life that I knew their actual purposeAnon
- I used to believe that the "Employees Only" room in the back of the store was where the employees lived. — KewlKid
- I was horrified when my first period arrived. It wasn't blue, like in the commercials for sanitary towels.— Jane
- I used to believe that every time i went in a store that the grown ups had to buy me something.— jvf