You are absolutely right Sasha Grey has an uncomparable ass. Specially if you look at the curves on the lower side of the ass, those are remarkable.
Some time you can see a little bit essence of this ass in the following girls;
Karina Kay
Georgia Jones
Bobby Kilmer
Enjoy
Some time you can see a little bit essence of this ass in the following girls;
Karina Kay
Georgia Jones
Bobby Kilmer
Enjoy