Anal sex has a tang of taboo attached to it, though this is disappearing: The taboo status of anal sex gives it better credence among the adventuresome and timid alike, and this adds to its attraction.
There is very little in between. Most women have tried it at some point, and a fair few of them will never dare again despite their hankering to be one of the "lucky ones" who love anal sex. The reason for this avoidance is clear: pain. If there was no pain, there was probably pleasure. Hence, love or hate.
It is true, however, that while you're trying to "get it right" there are likely to be some painful moments; however, practice makes perfect and it’s the ability to maneuver oneself and try different styles that allows anal sex to be pleasurable.