I don't do a lot of searching for porn. Sorry to burst your bubble, haha. I remember way back when finding even a website about periods was a shock. But wow, I did a search today for "menstruation girls" and it was pretty amazing how many porn sites have videos now! I'm not sure if I should be happy or scared.
Are they real? I have no idea. I looked at three, and I had enough. But... I had to share this. look for this one... I won't post a link. That's your job. "menstruation-girl-part2-video-4355117"
I agree - it's surprising how much period porn is out there, particularly since companies that provide internet billing services ban content that shows blood (See this article: "The Secret Censorship of Online Porn" motherboard.vice.com/en_us/article/kb7ak9/the-secret-censorship-of-online-porn). Some period porn is faked, apparently. I find that interesting - I wouldn’t have thought the market would be big enough to make it worth faking.