The 25-year-old actor hates his upper half so much that he got deeply insecure when pictures of him with his shirt off in Malibu were out, Femalefirst reported. "He's really insecure about his shirt being off," a source said.
Pattinson is believed to have taken up the sport after being urged by girlfriend Kristen Stewart to lose a few pounds. "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."