Robert Pattinson is "really insecure" about his chest
The 25-year-old `Twilight` heartthrob reportedly hates his upper half so much that he got deeply "upset" when pictures of him paddle-boarding with his shirt off in Malibu hit the media.
A source said: "He`s really insecure about his shirt being off."
Robert is believed to have taken up the sport after being urged by girlfriend Kristen Stewart to lose a few pounds.
A source claimed: "Robert`s put on nearly 10lbs eating cheeseburgers and drinking beer while he`s not been working.
"Kristen`s told him to pull himself together. He hates the gym, so she`s encouraged him to take up paddle surfing to try and work off the excess calories."
The `Cosmopolis` actor - who is also "trying to cut back" on the cigarettes in a bid to improve his health - has previously opened up about his hatred of shirtless scenes, especially when they involve his buff `Twilight` co-star Taylor Lautner.
He said: "I`d have to make a lifestyle change if I wanted to do shirtless acting. But it seems like every single actor in the world is doing a `Taylor Lautner` scene - it`s crazy.
"They have a scene where they walk out with like a 12-pack. It`s like, `Really? You`re playing a normal guy! That doesn`t make any sense.` But that`s a prerequisite of being an actor. Or you can get fat!"