Well, I 've never asked any of them before doing so. Once they've been satisfied in the missionary position, I get them to go on all fours so I can fuck them from behind doggie-style and when I see that sexy asshole perched up towards me, I just dive in and start rimming them and have never once got a negative response. Several said go ahead, fuck me in the ass if you wish.
Licking a girls asshole is one of life's greatest pleasures to me. It's so intimate and gets you both even closer together.
Having experienced many many anal orgasms from a variety of stimuli, mainly vibrators and butt plugs, I now know what my former girlfriend experienced with her orgasms. The simple yet wonderfully expressive sound of AHH, AHH, AHH, AHH, AHH, AHH, AHH, AHH, AHH, AHH, AHH!!! screamed in joy and pleasure describes it to a T. I can now experience this delight for many many multiple orgasms. What a gift and job the anal orgasm is, sort of like having a flower come to full bloom in your ass, or a hundred butterflys fluttering about in there!!!
Honestly, I never once asked before doing so having provided her with an orgasm in the missionary position to then ask her to get on all fours, so I get continue fucking her to orgasm. Once she gets in that position and I see that beautiful pink bung looking at me I drop some saliva on it and dive in with my tongue and gently lick it as I hear her moan out in pleasure, so I continue to lick it and when it's well lubed up, I insert my cock into her very wet vagina as I ease my thumb gently and slowly into her bung-hole. The number of women I've been with love it. Several have asked me to work my cock into their ass having warmed them up.
It doesn't do much for my wife for me to lick it, but she sure likes it played with as she is approaching orgasm. And then when she cums, she wants my finger stuck in it. It really enhances her orgasms.