Like "The Rocky Horror Picture Show", "Shock Treatment" features a brother-and-sister who frequently imply incestuous acts on the other.

A woman wears a skimpy, low-cut dress.

During the song "Lullaby", we see a scene of incest and a man taking pictures of a skimpily-dressed woman.

None.

The song "Bitchin' in the Kitchen" contains numerous uses of the titular word.

One use of the derogatory term "faggots"

Farley Flavors smokes a cigar. Nation McKinley, Betty Hapschatt, Ralph Hapschatt, and the Wardrobe Mistress smoke cigarettes.

Several characters drink champagne.

Although this is for humorous purposes, the fact that Brad is in a straightjacket.