Women being shy about bending over

Total ass man here. I love it when women bend over for me or get on their hands and knees facing away from me while I jerk off. This kink/fetish is perhaps unusual - but totally benign - yet I've found it surprisingly difficult to find women who are willing to do this. And it’s also quite black-or-white, something polarizing: those who are willing to do it are not simply willing - they tend to rather enjoy it.

I’ve had one girlfriend who enjoyed doing it, but the others either completely refused to do it, or did it with clear discomfort (which made it unenjoyable). Most girls won’t even do it for money (in Los Angeles at least). It’s much easier - and cheaper - to find rando sugar babies on the internet who are willing to give head for cash, than it is to find ones who will pose in explicit positions.

But I have had a handful of friends and/or sugar babies who enjoyed doing it - they thought it was hot. One example: before the pandemic I used to see this girl who was a student at a college near my place. She would sometimes stop by on her way home from class and pull her pants down and bend over, and she’d be visibly wet. And after 3-5 minutes when I was done, she’d be wetter.

I have a few psychoanalytical and sociocultural explanations for this, but I’d rather hear yours.