Do you like it? When did you start?
I never really considered eating ass until my attraction for TS started up about 10 yrs ago. It became the analogy (excuse the pun) to eating snatch which I had previously always enjoyed. Recently, I've found a couple of g-girls who really like it, one of whom likes it better than cunnilingus. I'm guessing the majority of my past gf's would have been repulsed at receiving a rimjob. Seems like the cultural acceptance of ass eating is a fairly recent phenomenon in the straight community - maybe 15-20 years from what we've seen in porn.
Kids today will never know what life was like before smart phones and ass licking became popular.