I used to believe that when adults had sex, it was only to have children and that it was only for a second, so that a man could let one sperm come out, but what about twins? I believed that the fathers of twins had left it in too long, and two had come out.
A childhood belief about getting pregnant

others believed things like this
- i believed if you had sex twice in a row you would have twins— dona
- i always thought twins had the same name as each other— Elle
- I used to believe that twins were always identical.Anon
- My friend used to think that having a threesome would mean you would have twins.— Yank
- i used to believe i would 'catch up' to my big brother one day and we'd be twins.— lil' sis
- That you could give birth to what ever you chose (i.e a girl, a boy, twins, triplets)— Krista Durling