@mangeurdenuage Why would they believe that? I'm more of the opinion that whoever said they believed it took that drawing out of context and made up a fact out of it.
I mean, can you imagine what people looking at hentai one thousand years from now will think of us and our knowledge of human anatomy?
It might as well have happened that someone threw some berries at a hedgehog and found it funny that they stuck, and then someone came and drew that.