My gf is not huge, but she has a huge wide ass for her size. She has great hygiene, but after a day of not showering it can get just a little bit stinky. Her ass has never been dirty, at least visibly, when we've done something before. I love eating her pussy when it's like that.
We have been together for around a year now, but she didn't want to do any doggy, or any positions where there was a chance I could see her asshole, because she was afraid I was gonna find it disgusting or whatever.
We live a couple of hours from eachother so we don't see eachother all the time, so when we meet up we're usually horny as fuck and get it on almost straight away. When we met eachother during summer vacation we had time to be together for a few weeks, and at that point we hadn't seen eachother for around a month and a half, so naturally we were both super fucking horny. She said straight away that she was comfortable trying doggy for the first time, of course I agreed. So she bent over we both need a little bit of adjusting, but she was scared to spread all out because she didn't want me to see her asshole. I told her everything was fine, and I wasn't gonna look at it. Of course as you might have guessed I couldn't keep that promise. So she bent over, spread her asshole and a waft of her "stinky" air, I say it in quotes because it's not stinky, but if you know you know sort of thing. When I smelled that I probably got the most horny I've ever been. I spread her ass and rode the waves for a little while. On every thrust her asshole retracted and let out a little air each time, until I busted the biggest nut I've ever had. I've never fucked someone that hard in my life before.
Sadly she hasn't been up to any ass play or anal yet, but that's more a question of when not if, because she sees how I horny I get when the sex is focused on her ass.
Those weeks during the summer was some of the best of my life, we didn't do shit other than fucking and watching anime all day. Sometimes when we went to bed my balls where aching and I couldn't even get hard anymore because I was so tired. Two weeks of basically non-stop fucking. One of the days she was high af and she was the horniest I've ever seen her. I was so tired because we had been fucking for a few hours and I basically couldn't get it up anymore. So she asked me to finger her while in doggy, of course I said yes because I wanted to please her. So she got into doggy, stuck her ass up in the air and spread her cheeks so far, in retrospect I think she did it because she knew how turned on I get from that smell. This was after a few hours of fucking so we were both sweaty and a little stinky, so I got instantly horny when I smelled that. I fingered her for like 30 minutes while I was sitting on the side of her ass, holding around her back and used like three or four fingers to finger her hard. And while I did that I just sniffed her ass. I got so turned on by that I was ready for another round of fucking.
So moral of the story is fuck a fat girl doggy if you get the chance. And try and get whiff of that ass smell. It might not be for everyone, but I've had a brap fetish for a while so I was really wanting to get a smell of her asshole. I'm not sure if I should mention the fetish to her yet, maybe in due time