To make a baby a man and woman touched parts of the body and that would make that part of the baby. So if they held hands that would make the baby's hands. If they kissed that would make the baby's lips. They had to rub butts in order to make the baby's butt. There was no doubling up. It wasn't like if they touched hands multiple times the baby would be some octopus monstroid. The parts would float around in the mommy's tummy until it was completed. The parts were good for up to 9 months. So you had to complete the baby in 9 months or you had some parts over.
A childhood belief about reproduction

others believed things like this
- That to make a baby a man (over 21 & under 25) had to kiss a woman (over 19 & under 21).— Johny
- When I was first told about intercourse, I didn't believe it. How could peeing inside a girl make a baby?— Art
- I thought my neighbor breastfed her baby because they were too poor to afford baby bottles. Maybe they were!— Kristen
- on "highway to hell" i always thought it goes "baby see, baby do" instead of "hey satan, payin´ my dues"— Miss Understood
- That because Gerber Baby Food had a baby on it real babies were put in there. Thanks a lot cousin!— Nicole
- I used to believe that a baby shower was a tiny bathtub with a showerhead just for the baby.— Amy