A childhood belief about periods

this is a boy's belief in my 6th grade science class.
In sixth grade i was doing an assignment with the boy at my lab table. i took out a jumbo pink highlighter. the brand and words on the marker had worn off so it was just plain pink nothing on it. the boy was like oh my god! put that away. i was like chill out what they heck is your problem? he said "thats a tampax. thats the little case you keep your tampax in, gross put it away." my young and really cute science teacher walked up and was like what the heck?! I told the boy it was highlighter and took off the cap and showed him. the boy was so embarassed he got up and went across the room to his friend to get away from me. my teacher looked at me and said "boys can be kind of dumb with girl stuff you know? just ignore it." i could have died. my teacher was SO hott and i was so embrassed i couldn't look him in the eye for a few weeks.