OK! Exclusive: FKA Twigs Puts Robert Pattinson On A Diet To Improve Their Sex Life While His Friends Are Shocked With His New Look

Robert Pattinson and his new girlfriend, British singer FKA Twigs, are blissfully in love, but not everyone is happy—including his lady!

An insider told OKMagazine.com exclusively that FKA, who is a trained dancer with a rockin’ bod, is trying to force her “gymphobic” boyfriend to start eating healthy and working out with a whole new diet and exercise regime! But it’s not because the Twilight actor is gaining weight—she wants to improve his bedroom stamina!

“FKA’s so fit it’s not funny and she outperforms him in the bedroom all the time,” the source revealed to OK! exclusively. “He’s very unfit, smokes and drinks way too much, but she’s convinced him he’ll be much happier if he’s more healthy.”

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The source said FKA, whose real name is Tahliah Debrett Barnett, is “teaching him what foods are good, limiting his booze to low-calorie spirits and getting him pumping barbells in his spare time.”

Meanwhile, Rob’s friends aren’t too pleased with the way he’s been acting since he started dating FKA!

The insider said his friends and family are “in a state of shock” over his new haircut and partying too hard to try to “fit in.”

PHOTOS: Check Out Robert Pattinson’s Shocking New Haircut!

“Rob’s been going through a very strange phase, and while there’s no doubt he’s sweet on Tahliah, he’s partying way too hard for his own good and acting like a total space cadet,” the source said.

Despite his super cool persona from his Twilight years, RPatz “was always a bit of a nerd growing up” and the source added that he’s been trying to make up for lost time “by making this huge effort to fit in and be cool.”

“He’s easily influenced and this is a classic case of Rob trying to impress the cool crowd of hipsters he’s been hanging out with.”

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Worst of all, his friends and family have tried to talk to him about his changing appearance and behavior, but Rob isn’t having it because he only has ears—and eyes!—for FKA!

“His oldest friends and even his family are shocked but he’s not listening to anyone and genuinely thinks it’s a cool new style!”