the mpaa

maybe someone can explain this to me. saw 2 movies back to back last night. one was a love story (ish) thing inspired by a film noir full of blackmail and double-crossing and "vertigo" and had a film within a film and all that fun stuff. the other was a convoluted psychological drama where a guy who was supposedly time-traveling (i guess, they didn't really bother to explain it) essentially had sex with an 8-year-old girl while he was actually dead. that, was rated "R". the "vertigo" inspired thing, "NC-17" for sexual content. go figure.