A few years ago, I discovered I have a strange fetish. My ex girlfriend and I were 69ing and I was on the bottom. As I was eating her pussy she moved and forced my nose directly onto her asshole, I just happened to be breathing in and the smell of her asshole turned me on. Then I pulled her ass down on my face and began sniffing furiously. I told her how smelling her ass drove me crazy, and luckily enough it didn't gross her out. After that I couldn't get enough. She used to force me to sniff her asshole and watch me masturbate. I totally worshipped her asshole