What "daes " says is just proof that when taken by professionals, slaves or subs enjoy anal sex immensely, even if scared, disgusted or simply overtaken by popular misjudgements.
Personally I had one woman tell me that she never believed it would ever become a pleasurable thing at all, and in our offline relationship she even told me that the only reason she was willing to go though it, is to please me.
Training, play-sessions, orgamsn restrictions for periods of time, sphincter
teasing, and something I call "floating in the water" (two beads encapsuled in a clean steel sphere and inserted in her ass for an entire day while she goes along with her workday) made the trick and today she -as she said herself- gets up in the morning thinking and craving of it, when she knows that on that day she will be taken anally.