My brother used to believe a feminine napkin was something only women could blow their noses with.
A childhood belief about periods

others believed things like this
- I used to think that if you didn't blow your nose and just sniffed the snot up, you head would blow up.Anon
- i used to believe that a blow job was when you got payed to blow up ballowns— blown away
- Split walnuts... i used to think they were dried pig noses!!— SaMmI LaMy
- when i was little i thought people with big heads or big noses had cancer...Anon
- that a blow job was when u blow on it...— pav
- i used to believe that if you were a kid and u turned the radio on in your car then the car would blow up— steph