Russell Brand wanted to do what?

But, you ask yourself, what really caused the sad break-up for Katy Perry and Russell Brand? Different goals? Too much time apart due to work? Inability to agree on how to decorate their house? All good guesses, but you'd be wrong. Us has a source, who may or may not be A) Katy Perry, B) Imaginary or, C) Completely non-existent.  And that source says:

"He likes dirty things. He really gets off on one particular porno with a guy in a wheelchair. He's attracted to things he can't imagine happening to him." The pal adds that Brand has a bag of sex toys in his closet.

Well, as you know, I'm never one to judge. But I will say that if the person you just married a year ago is already watching wheelchair porn, no amount of lingerie is going to salvage that relationship. Not that there is anything wrong with wheelchair porn. It's more a question of diverging interests.

Here's some more (but really boring) stuff from the Us story. Team Katy has been working full-time on this one. Good showing. I hope there are some bonuses coming your way.

"Ouch! Chart-topping, record-breaking superstar Katy Perry had the best year of her career so far in 2011 - but husband Russell Brand wasn't always cheering her on, pals reveal in the new Us Weekly, out now. "There were so many times when he wasn't there," an insider says of Brand, 36, who blindsided Perry, 27, by filing for divorce Dec. 30 without consulting her. Weeks before, when the "Firework" singer guest-hosted Saturday Night Live, the British comic turned down Perry's plea to perform in a skit with him, remaining in L.A. instead. And after Perry had pulled off her SNL stint? "He told her that she wasn't that funny," an insider says of Perry's skits parodying Pippa Middleton, Christina Aguilera and others. "That really hurt." And when the Arthur star did show up to support his wife, as he did at Perry's final concert stop in November, "He was totally uninterested and seemed annoyed he was there," says a witness. "I don't think he sat through one song."