Sadism vs sex
From the synopsis: "Composed of three disturbingly sensual..."
Really? I found the three short stories disturbing, but without much of the sensual bit.
Sure, I like seeing sexual acts and naked bodies being depicted explicitly as much as anyone, but the people involved were rather sadistic and depraved than enjoying themselves.
I'm not sure what the writers/directors wanted to convey, but at least it wasn't sex.