Of the women i've been with, whose anuses i've seen up close and personal, some waxed the area, some shaved, some neither. the hair never really make a difference to me, i absolutely enjoyed their bottoms regardless.
one was a girlfriend from italy and was completely bare and hairless front and back when we started dating (she later told me she knew she was hairy and a bit embarrasses about it and didn't want me to see her like that). i told her i didn't care if she had hair there or not, so eventually she stopped waxing. over time the hair grew back. she spent a lot of time on her stomach with her bottom spread open since we both loved anal, so over time i noticed how the (dark) hair grew back between her cheeks. i loved it, because it seemed so raw and natural. as she said, "what do you expect, i'm mediterranean. we're hairy."
i dated a blond woman when i was in my late 20s who had a slightly hairy anus but because that hair was blond too, i didn't notice it until the time we first "played doctor" and i did a very intimate and personal anal exam, with a photography magnifying glass (believe it or not, that was her idea). i told her i could see the little blond hairs around her anus. she was surprised and hadn't realized it. on a few occasions after that, she asked me to pluck those hairs with tweezers. i thought it would hurt her but she said it didn't. now, that was definitely the most upclose i ever got with her anus. she was also the first woman to convince me to get rid of the hair around my asshole. she shaved my anus bare (and later was the first and only woman to fuck me there with a strap on). she said she absolutely loved that i was hairless and loved watching while she fucked me like that.
most of my other former girlfriends had very little anal hair. i do recall that two who had quite dark anal hair were from families of the mediterranean region. neither had any that you could see when they were standing or lying down with legs together. the hair was only inside their bottom crack and around the anus itself. another girlfriend who was greek was very shy and reluctant about her body and nudity. because of her nationality i thought maybe she too would have dark pubic hair. as she relaxed and we finally got more intimate, i found that her vaginal hair was a fairly pale brown. i was still very curious about the hair between her cheeks and up to that point had never even seen her there. one night as i caressed her backside i decided to have a look and when i pulled her cheeks apart with my thumbs, she didn't flinch. feeling a bit more confident, i couldn't resist and started rimming her slowly and gently (she moaned and i knew we'd crossed a threshold) and then lifted my head to have a look at her tiny and incredibly pale anus, almost the color of her skin. she was surprisingly completely bare there, absolutely not hair that i could see.