hey fellas.

I enjoy woman’s ass. I regularly rim my wife and that gets me going. I noticed I like sniffing her unwashed ass once when we went to a camping trip and she didn’t shower for almost 3 days. We were fucking and I went down on her and tried to eat her ass, she pushed me away saying she is dirty and didn’t;t shower. I said let me sniff atleast won’t lick it, and I took a deep sniff and just got hooked. Up until then I never even try sniffing when she says she is not clean. Those few days I just loved putting my face deep in her ass and that musty, unwashed strong scent made me go crazy. A Few months ago, once we were having sex and she had to poop, she went and came back to continue and I tried to eat her pussy and she said please don’t I just took a dump and don’t feel clean. I went down anyway and the scent of her just wiped butt, slightly damp and smelly intrigued me, I slowly sniffed without making it obvious. we finished and I since had been wanting to smell her after she goes. She always takes a shower right after and one other time she had a work meeting, she took a dump Wiped and was washing hands to run to meeting. I said give me 2 mins to sniff your butt, she said thats disgusting and I am watching a lot of porn and escalating my kinks. I begged her and spread her cheeks and sniffed, I also slightly licked her asshole, it was a bit bitter there is nothing there but the feeling that I licked her poop stain or whatever there is made me super horny. Since then I have this fetish of she cleaning her self up and maybe leaving a few stains and I clean her up after. She won’t even entertain it but the more I think about more I am intrigued by it. 

Any idea what this is? How do I convince her of letting me do it? Does any of you have this fetish? 

Thanks