Sammy dear,
Yes you hit the nail on the head there.A lot of guys watch way too many blue movies and forget the acting aspect of it.
Everyone is very very different when it comes to sex.Personally i found anal doesnt do much for me.The biggest turn on for me is doing oral on a woman but thats just me.Anal can hurt at times and there is also a lack of control on the girls part meaning that if she is dealing with a cheap guy then he can easily hurt her.Some women find it lowers them.Also and no disrespect here but ours asses were made for crapping.Do anal without cover and your asking for trouble.
At the end of the day,escort ,gf whatever ,it all comes down to decency and respect.A guy should never have a girl do something that she doesnt want to do.
From an escort view why shouldnt an escort charge more for anal or have the choice.One thing though.Besides its an anal word and sounds so damn gay.

Yours Anally,
Westside.