I think there are probably only 1 percent (or less) of girls between 18-45 years old who actually like, and enjoy fairly regular anal sex.
When I was in my prime between 20-26 years old, and sleeping around...I only ever had one sexual partner who asked and begged me for anal sex.
Deep, hard anal pounding is great to see in porn...but not many girls are willing to do it in real life.