How is it that some women can manage enormous lengths and other women wince after about 5 or 6 inches ? I know we are all made differently but surely there are limits. What is the physiology of this ? For example there is one video of a girl with Mandingo and she is on top clearly taking all of him with relative ease. As I understand it Mandingo is at least 11" long and if you were to measure 11" from the entrance of her vagina you'd end up mid way up her back somewhere! Can anyone with explain this ?