I'm actually not that against the abnormally large vaginas (this is porn, we have cocks the size of forearms almost as a staple, and I've seen worse (Oreteki18)), but the shade of red that he colors them make it seem like they're covered in a layer of blood. My mind might have only gone there because of the rest of the content, but it still hinders my enjoyment a bit.
These works are really fun, I understand folks' issues with vagina stuff, but to me it's a quirk of the artist. What I love about the work is the focus on consent and beheading.