(VERY NSFW) Can futanari be real?

I wrongly stumbled on a manga that I thought was something (and it obviously wasn’t), and it was about something called “futanari” (a genre of Japanese anime or manga featuring hermaphrodite women; a character in such works).
So, I looked it up on some website, and it had pictures (unfortunately), and they were of “real” women with these gigantic penises. We’re talking, 12’ or something. So… is this a normal occurrence? Or is this all fake, with dildos or something?