Game News HQ - Fallout: New Vegas Has Robot Sex
Not only can players have sex with human beings, but they can also have sex with robots, as the rating suggests players will have sequences where it's made apparent for both.

The rating also lists what we've come to expect from a Fallout game, such as drug use, slow-motion killing, "cracked out junkies," and "degenerate, drug-addicted killers."