I bet you are a squirmish prude when it comes to sex, because I saw this MPA and occasionally when I visit her I give her asshole a good tongue licking (because she is that good-looking), sometimes I go as deep as I can with my tongue depending on my mood (and her mood if she is willing to spread open up that back hole for me), and everytime after I finish licking her asshole for 10 minutes straight, I pull my tongue out of her butt and continue kissing her on her mouth; on her lips and add in tongue too. And we always kiss a lot during our sessions.
For the first several times I ate out her asshole, and before I started kissing her after I was done licking her butthole I asked if she wanted me to use mouthwash to clean my mouth (because I am a gentleman), she always says no, so now I don't even ask if I need to clean my mouth, I go from straight from her ass to mouth when it comes to kissing. And she is a great kisser.