I used to think that a blow job was when you dried your hair with a blow-drier. So when one of my older brother's friends asked me, when i was about 10, if i knew what a blow job was, I replied, "yeah, i give myself blowjobs all the time".
A childhood belief about oral sex

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
- I used to think that a blow job was drying your hair, like blowing your hair dry.Anon
- My brother used to believe a feminine napkin was something only women could blow their noses with.Anon
- when i was little i used to beleive that if i coughed, sneezed and farted at the same time i would blow up— fart
- I was told in first grade that if you fart burp and sneeze at the same time you would blow up— bob doodle