It's funny, in the movie Mallrats, there's a scene where Ben Affleck is describing the things he's doing to the protagonist's ex girlfriend:
Funny how opinion on anal sex has changed - in the mid 90's, anal sex was something deviant that women were not into (probably because it's dirty and painful) then some time later in Clerks 2, we have Rosario Dawson approving of ass to mouth ffs. Not only does she not mind taking it up there now, she'll clean it off for you orally! One wonders what cultural changes took place between these two movies to make these acts go from unacceptable deviance to cute mutually enjoyable sexual practices.