A childhood belief about getting pregnant

I thought that when a man and a woman wanted to have a baby, the man would stick his penis into a woman's belly button and urinate into her stomach. He would then do this everyday for 9 months. I thought that he kept doing it every day so the baby inside had room to swim around as it grew. I then thought that when the baby got a certain size, it would then wake up and then crawl its way through the woman's intestines and then push itself out of her anus. I thought they were telling a woman to push it out her ass like it were a piece of shit. Since i was a male, the only forms of pushing i could thing of was using your hands to push an object and pushing crap out your ass. I also came to the conclusion that woman had extra arms inside their butts that would help push out the baby.