I can understand women saying it's disgusting because it's out of envy, similar to how a woman with a nice pair of tits, automatically get labelled by girls as having implants.



"Scientists Say That Women With Bigger Butts Give Birth To Smarter Kids"
"According to a 2010 study from the University of Oxford, big butts result in healthy children because of the high amount of Omega 3 fatty acids (the good fatty acids) stored. These are the same fatty acids that are responsible for the normal development of the baby's brain."
So big asses ---> Smarter kids.
In addition, A big ass usually means a good hip to waist ratio which means a big pelvis which makes child birth easier and therefore more offspring are likely. Narrow pelvis would have mean a hard child birth and possible complications for both child and mother.
The 'Main' position/most animalistic is doggy, and what you see most from behind is that ass. I'm having a hard time understanding why men on gag would want to be hitting this (see below) from behind as appose to the girl above.

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