Thematic Materials

Follow-up to the movie blogging:

The Skeleton Key was rated R in part because of "Thematic Materials."

I have a reasonable grasp of the English language, but "Thematic Materials" tells me exactly jack plus shit. Do many movies not have "thematic materials"....? And what about themes makes them inappropriate for children?

Instead of a weird euphemism, the rating board should probably just say "Bad Hoodoo Mojo and chicken bones and crap like that." Lord knows there isn't a single parent out there that could use "thematic materials" as a basis to judge a movie's content.