I believe that different body types respond differently. The natural size of a womans hips & vagina vary as much as men & the size of their penises. In other words there is little correlation between the height, weight, size of men's body & their penis size. The same holds true for women. I have been with women that are petite that physically can handle large to extra large cocks with little effort & larger women that can barely handle a average to slightly larger than average penis. I believe child bearing is highly individualized as to what a woman can handle size wise afterwards. Some can def handle a larger penis or dildo while others cannot. I have been with enough women to know this much. I have been with mothers that are every bit as tight as any women without children. I have been with young women, whom never had any children who are quite loose or simply larger with absolutely no correlation to their overall physique. Now that I am married, I can honestly tell you this..*ahem* (clearing throat)..I am NOT the size of my username(its wishful thinking really, although I will begin stretching exercises which is a whole another story) I am INFACT slightly over 7"x6". When I met my wife I thought I was gonna really stretch her out. Negative, to my surprise ! She was surprisingly "loose" but very aroused so I did not give it much thought at the time. Not long after we began dating the subject of her previous boyfriend came up..& I was curious as to his size. Wrong question, & she (too her credit) was brutally honest. He was much larger than I, easily 8.5-9" but MUCH more girth which is what she truly likes. I was fascinated & slightly aroused. That explained how easily she handled me, as she was towards the end of that relationship..which lasted a lil more than a year. Here we are 7 years & 1 child later and she is MUCH tighter ! A womans vagina is a amazing thing of beauty. Without any doubt the vagina is capable of amazing versatility & boundaries. I believe most woman can truly adapt to most any size given time & circumstances. I know I hardly post at at all, but I felt compelled to give my opinion as well as experience.