Not me but a boyfriend.. we were about 19 at the time so it's still a little amazing, but something he said offhand make me dig deeper and I found that he thought women's nipples were actually solid.. no holes.. and when it was time to breastfeed, the woman had to sterilize a needle and puncture a hole before any milk could come out. Just the once, but still.
A childhood belief about rude bits

others believed things like this
- I thought that to breastfeed, a woman had to poke a hole in her nipple (like the hole in a bottle nipple).— Imani B.
- I used to believe that cow udders were hollow bags full of milk.Yet I knew that human boobs were solidAnon
- that black women breastfed chocolate milk instead of white milkAnon
- my boyfriend used to think that Hanna and Barbera were two women that did all the cartoons— Helen
- Met a man who thought every woman could give milk, whenever, wherever.— Missed that bullet
- I convinced my boyfriend that paprika flavored crisps were made from donkeys...he was 20 at the time.Anon