Things you believed as a kid

[Amaterasu]

I thought that men and women reproduced by kissing. The testicle 'egg' would rise from the ballsack, up through the body, and pass through the mouth and then down into the woman's stomach where it would gestate. It was a solid theory, but my parents would never confirm, deny or answer my questions like "so can a man only have two children?"

I actually thought something similar, back then I knew about the birds and bees but I didn't realize that sperm was a thing, so I thought that said "egg" would be inserted into the woman by the man, and the amount of testicles that they had said how many children they could have at most.
I'll leave you with the mental image of what I imagined it was like for the dad of a family of 9 children that we knew... things had to be pretty packed between his legs!