I used to believe that menstruating meant you were diseased, so when my mom got her period I thought she had a rare disease. :D
A childhood belief about periods

others believed things like this
- I used to believe that all old people got the disease "OLD TIMERS DISEASE" Instead of alzheimers disease :D— MollyJohnson
- I used to think that Alzheimers disease was called Old Timers Disease.— Justin
- I used to believe that when I started menstruating, I would bleed to death from losing too much blood.— Debbie
- That Alzheimer's Disease was Old Timer's Disease.— Todd K
- I thought there was a disease "Bigpox" that was like Smallpox only more horrible..— Xenomorph
- I used to believe that condoms were rare expensive water balloons— Andrea