As the vagina also acts as a birth canal and it can stretch to allow a for a 6 to 8 pound baby to come through it, it isn't hard to imagine to be able to take a whole fist inside it. The difference between them is the later being more enjoyable.
Very sexy! Beyond hot for it’s time - and very hot by today’s standards too. I love seeing those cunts stretched by fists! Watching some girls get ass fisted is very arousing too!