We see, moderately close up, a man in silhouette defecating; fecal units actually come out of his rear and drop into a bowl. His genitals are briefly visible from behind, also in silhouette, as he rises. He then manually scoops it into a waste chute.
A person is punched, and has a bloody nose. And one character threatens another with a knife.
Black goo oozes out of a character's ear, nose, and eventually the entire body is covered with it.
Even though the movie is about sexual stimulation, to the viewer the machine seems more like torture, and sometimes it is torture to the receiver too.
There is some blood and yelling during operations.