I thought that insertion automatically resulted in pregnancy, 100% of the time. I later refined this to believe that ejaculation while inserted resulted in pregnancy, 100% of the time.
A childhood belief about reproduction

others believed things like this
- Up to the age of 12 I was convinced urinating while in mid copulation resulted in a Downs Syndrome baby.— Nathan Harlow
- i used to think that PMS stood for "pregnancy morning sickness".— confused little girl
- Premature ejaculation was when you came before you reacher pubertyAnon
- I used to think "premature ejaculation" was a boy ejaculating before he hit puberty.Anon
- i used to think that birth control pills should be inserted vaginally. Anon
- I used to believe clip on bow ties were inserted into your throat and that is how they stayed in placeAnon