Most ludicrous reproductive myths you've ever heard
My personal favorite was from my great aunt.
She told me that if I ever sat on a toilet in someone else's home, I could get pregnant, because men masturbated on the toilet and some of the semen would be left behind and swim up into me.
I'm not joking. And the idiot that I was, I did not sit down on any toilets anywhere but home till health class in 9th grade.
I wish I was making this up.