thanks krumby!.you know your stuff

Thanks.
I don't know much. I am just old but still learning. Having this one fetish-fantasy all my life helps but I don't really know much compared to what there is to know.
I had this size fantasy before it became my practice (or fetish). I remember the first gigantic woman I met and how relations with her were a teeter-totter to my amazement. Her pubis bone supported my body weight and my knees would not touch the floor when we had relations. I just rocked like a teeter-totter with my pelvis rocking on the top of hers where her pubic bone is.
I posted a video like that in the old forum but that whole thread is no longer there. In that video the woman has hips 3 times the width of the large man futilely trying to have penile relations with her. He was like I was -- just rocking back and forth into a cave. But I wondered if he tried any stretching like I did. I would guess this video likely shows the largest pelvis I ever saw -- and she is only one out of many millions of women to be so extremely large. A lot of women are as wide -- but her pelvis size is revealed by having a pubis so very high off the floor!!!
Today, I used my Windows "Paint Program" and pasted a "print screen" from that same video. I then copied and pasted another picture into the bottom right corner of that picture.
The picture I pasted there was where a woman had a 8 1/2 inch wide uterus filled with a huge non-cancerous tumor that made her whole uterus push outside of her vagina when she strained hard -- and her husband would then push the 8.5 inch wide uterus back inside her -- to a depth even over the 8 1/2 inch width. They seemed to enjoy this activity -- especially his wife who even like this so much she chose not to have the surgery offered to remove it.
I pasted that llittle picture (scaled down to about the same size using his foot size shown in the larger picture) just to illustrate how much smaller her pelvis is compared to this huge one -- where the man is doing the teeter-totter on her pubis bone. In the larger picture, not only will his knees not touch the floor, he can rock where his feet come off the floor! Notice how far his knees are off the floor.
I wanted to show the very extreme size pelvis a pelvis can be -- at least that I know about. The woman in the little picture that can take something 8.5 inches wide in and out of her cave is huge. I still can't imagine a near 100% stretch in one the same size of the much larger teeter-totter Pelvis. The woman with the 8.5 inch stretch probably has a 8.5 inch sit bone gap.