Until I was about 11 or 12, I would not go down the condiment aisle in the grocery store by myself. I thought that was where the condoms were displayed/sold and I was too embarassed to let anyone see me near a condom.
A childhood belief about condoms

others believed things like this
- for some time I used to think that at a drug store people really sold drugs.— NEO_ryu
- When I was little I thought "Pencilvania" was a huge store that sold pencils and nothing but pencils.— Tim
- When I was little, I thought dying your hair would give you the color AND hairstyle displayed on the box. Anon
- I thought brown paper grocery bags would fit more than plastic grocery bags.Anon
- I used to believe that the disposable BBQ's had the meat displayed on the packaging was included inside. — Raggamuffin
- As a young child I thought plumbers were men who sold Plumbs!— peta