IGN states that in addition to male and female prostitutes available for both genders, there are now robots that the courier can romance.
There is also an extended sequence suggesting (no depiction) sexual activity with a robot (e.g., "Fisto reporting for duty . . . Please assume the position," "I suppose I should test you out . . . Servos active!" and "Something wrong with someone if they got to f**k a machine.")
So assume this the first game to get an ESRB warning for "Suggestive Themed Robots"