But it appears the British actor is a bit of a snooper himself and has admitted that he is intrigued by inner thoughts of other people.
"But sometimes, if you know the person, it's kind of interesting. I find listening to people's [dreams] interesting, even if I don't know them. I also like reading their diaries."
Robert plays a billionaire asset manager who has a strange car ride across a city and comes across a plethora of intriguing characters in the upcoming movie.
The 26-year-old added that he is not always good at interpreting things correctly including director David Cronenberg's other artistic work which some have found confusing.
"In terms of understanding it, I don't know. I mean, I get weird things," Robert said.
"I am an expert at reading things wrong. I will take the opposite interpretation, even when something is blatantly obvious, especially with scripts. The amount of times I've gone into an audition for something, I will be like, 'The guy's the bad guy right?' and they're like, 'No, it's 'The Notebook."