I truly enjoy licking and eating my wife's ass - I find it incredibly intimate and
extremely arousing, and I'd do it 100% of the time if she'd let me (or at least put it into the same rotation as the other things we do). Unfortunately, she (usually) has a strong "yuck" reaction to me doing this and (again, usually) stops me and redirects my attention back to her pussy. But she knows how much performing analingus
on her turns
me on, so she doesn't always stop me, and when she doesn't it becomes obvious that she really likes it
a lot and it often leads her to a screaming orgasm. So like
@BWPHOENIX said w/his "frozen pond" analogy, when I do this I move gently and am prepared to back off quickly if she isn't into it. But it took me a number of years to reach this point; younger me would have been grossed out, but middle age me really, really likes it.