Asimov stories featuring robots and deceit: one short story has a candidate that people think is a robot, but this islaid to rest when the candidate punches out a loud-mouthed yob at a function. Only at the end of the story, it's revealed the yob was also a humaniform robot. The candidate did not harm a human, but was also not exactly being truthful in all regards concerning the situation. However, since nobody thought to take the conspiracy idea a step further and accuse both the candidate AND the protesting reprobate of being robots, the robot was able to run with no further questions concerning his humanity and was elected. Wish I could remember the story's name.
There was another story, can't remember its name (help with these story titles please, people) where the android sees that a woman left at home is emotionally harmed because her husband pays her no attention. So it romances the woman in an attempt to alleviate the First Law conflict.
There's also the "Zeroth Law", where the robot would not allow the whole of human civilization to come to harm through action or inaction. Because there are so many conflicting desires in groups of people, and making one decision that helps one group may emotionally hurt a second group, the robots elect to withdraw and watch mankind from a distance as they colonize the galaxy. I remember this happens at the end of the Foundation trilogy.