It's 2015, so the only thing that made me gag was...
I just saw this movie online. It's 2015, so few outside of the most fundamentalist evangelical Christians are still pretending that they are not perverted and masturbating like the rest of us in this far-too-convenient age of porn. So with all of that free access and countless Netflix "steamy" movies under my belt, so to speak, I wasn't at all as shocked as I surely would've been in 2002 by this movie's unrelenting "inappropriate" scenes of explicit masturbation, implied incest, suicide, contributing to the delinquency of minors, drinking/smoking while pregnant; swinging sexuality, drug use, threesomes, bondage, sexual asphyxiation, murder, elderly abuse, full frontal nudity, statutory rape, and on and on and on.
So I'm somewhat amused that the only thing that made me cringingly turn my head and gasp in off-putting disgust was watching Peaches instruct Curtis to open his mouth and then spit into it.
Otherwise, if you've seen 9 Songs, Short Bus, Nymphomaniac, Brown Bunny, or even the mainstream 50 Shades of Grey, you'll barely blink. It's intense and disturbing art, but art nonetheless--not porn.