My friend once told me that when she first got her period, she thought she would spend every other month bleeding for the entire month. When her mom found her with a calendar figuring out which months would be her "period months", she explained to my friend how it really works.
A childhood belief about periods

others believed things like this
- My mom told my sister that if she didn't eat her peas, her period would last for an entire month.— Maya
- For years I thought that spunk was a male period and that boys spunked once a month - Yeah right!— Stupid Child
- When I was a kid, I found out about a womans period and I thought that she would bleed through her breasts.— Michael
- My sister used to think that because I was 15 months older than her, I would die 15 months before her!— Nicola Braden
- When I was little my sister told me salt was ground up dinosaur bones...I barley ate for a month...— Chandler
- My sister believed that october was the 10th month!— Sally