A high school friend - a guy - thought that when girls had their periods, they just had to go sit on the toilet for about ten minutes until the bleeding was all done, then the period was over. At the time, he was 16 and he had a sister...yet this was his belief.
A childhood belief about periods

others believed things like this
- I used to think that girls' anuses were green. I remember thinking that as late as high school.— Jack
- When my mom was a child, she thought that while girls had periods, boys had hemorrhoids!Anon
- a male friend of mine used to think that only women who had been pregnant had periods— oiman
- I thought that wars had to last four years... just like high school and college.— A. Falk
- Until I was in High School, I really thought that the "underground railroad" was under the ground.— S
- Until junior high school, I thought Monty Python was a wrestler.— Jamie