"Here's the proof there was never anything going on with me and Robert Pattinson. I fart in front of him. Properly fart. And I never, ever fart in front of a man I am dating. That's a rule. We just hang out. The other day, I said, 'One of the things I'm most proud of is not sleeping with you, Robert.' And that's true." Singer Katy Perry is adamant her relationship with the Twilight hunk is strictly platonic.