In the September issue of Elle UK, Katy Perry mentions Rob. Rob and Katy have been friends for years and it's sweet to read how she regards their relationship. Plus she's so funny with the farting. It's worth DR debate. ;)
I transcribed the Rob mentions but the scans are all below if you'd like to read the interview in its entirety:
Like her pyrotechnic stage outfits, her humour is saucy and postcard style - all double entendres and faintly inappropriate fart jokes. "OK, so 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." It's typical Katy - a disarming way to diffuse an awkward topic. "He's my bud, I'm like his big sister. 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."
Part of me thinks quiet, English Robert might be a loverly boyfriend for Katy. Yet it's clear, given her predilection for bad, big-mouthed boys, that he is absolutely not her type.
.....
She also has A-list girlfriend, with whom relations sometimes seem a little strained. Mortified at being painted as the other woman, she made sure Kristen Stewart knew the Robert Pattinson relationship rumors were just that. "I sent her a text message saying: 'I know you've seen all this stuff, but you know I would never disrespect you. I'm not that person. I'm just trying to be a friend to him but it is unfortunate that I do have a set of tits.'"
Source | Thanks C! | Photo from 2010 TCA when Katy was hosting