Eating ass is probably the best oral sex activity, at least for me. I love how a woman's asshole looks, smells and tastes, knowing that it is used for waste expulsion makes it more dirty and sexy. Many women prefer their assholes eaten but are too shy to ask because they don't want to be judged. I always make my way to her asshole and always tell her how good she smells, how naughty it is to be doing it and how beautifully erotic the act is. By going straight to her asshole, you avoid her feeling uncomfortable and self-conscious.