I was in a relationship for about a year and a half with a girl who loved having her ass eaten when it was dirty.  She loved holding it in, letting all the pressure build in her stomach while I held my face between her cheeks.  She would try to hold her shit in while letting little farts out as I kept licking. I could taste the sweet and bitter mix as she tried not to let it all out. When she would finally go, she would go on a plate and smear some around her asshole and on her nipples for me to enjoy. It was definitely the most intense and intimate relationship I've ever been in, and I hope we all find someone to share this with!