A childhood belief about reproduction

By the time I was about six or so, I had gathered the gist of how sex works: the man sticks his penis in the woman, ejaculates (although I didn't know that word) something into her, and then she gets pregnant. However, I didn't exactly understand *where* the man stuck his penis. So, using standard kid logic, I figured that since women don't have a penis, the only remaining bit down there is the anus.

I decided at that point that I never wanted to have kids, because the last thing I wanted to do was shove my genitals into some woman's behind.