My ex-boyfriend (who was in his 20's) thought just because he had twin brothers, it was without question he would father only twins. And he thought pregnancy would happen every time a man and woman had sex. Never heard of a condom or the birth control pill, obviously.
A childhood belief about reproduction

others believed things like this
- That you could give birth to what ever you chose (i.e a girl, a boy, twins, triplets)— Krista Durling
- I used to think birth control was where you could choose the sex of your child.Anon
- when i was young i believed Micheal Jackson and 'the artist formerly known as prince' were twin brothers.— tim
- I used to believe that birth control was for deciding to have either a boy or girl babies. Anon
- i used to think that birth control pills should be inserted vaginally. Anon
- That my dad gave birth to my brothers,and my
my mom had all the girls— Michelle H