Robert Pattinson Calls Taylor Lautner Ab Comparison ‘Unfair’

'I realized [my abs] weren't as good as Taylor's, so I just ate every bit of chocolate,' Pattinson laughs during 'MTV First.'

Much ado is made over the handsomeness of the leading men of “Twilight” — Robert Pattinson and Taylor Lautner — particularly when it comes to the subject of their being shirtless in any way, shape or form.

Their fervent fans know from reading Stephenie Meyer’s books and seeing the first two trailers that there is plenty of shirtlessness in store for them when “The Twilight Saga: Breaking Dawn- Part 1″ opens November 18.

MTV News was lucky enough to sit down with the two heartthrobs during “MTV First: Breaking Dawn” on Thursday, during which we asked a fan-submitted question about how they prep for their shirtless scenes.

“No M&M’s,” said Kristen Stewart, who was seated between her co-stars.

“Yeah, I didn’t eat any candy and I didn’t drink any beer for a while,” Pattinson said of his health-conscious prep. “I went kind of nuts. Me and Kristen went nuts working out, because we hadn’t worked out for any of [the previous films],” he admitted.

Then, upon noticing that his shirtless photo was being held up next to Lautner’s, RPattz took offense in the comparison. “This is so unfair doing a comparison. Everyone says I painted on my abs in ['New Moon'] — I did not! Taylor has his painted on too!” he accused with a laugh.

“What?” Lautner responded. “What are you talking about? I don’t understand this.”

Pattinson stopped his playful ribbing of Lautner for a moment to finish answering the question about his diet before shirtless scenes are filmed.

“I had it for, like, two weeks,” he said of his abs, with Stewart agreeing and adding that they gave up being healthy immediately after their skin-showing scenes were wrapped.

“As soon as I didn’t have to be shirtless anymore [my good habits were] gone immediately,” Pattinson continued. “During [filming in] Brazil, the day before I had to do my shirtless scene, I realized [my abs] weren’t as good as Taylor’s, so I just ate every bit of chocolate in the mini-bar. I started eating cheeseburgers and stuff.”

Stick with MTV News for much more from our exclusive Q&A with Kristen Stewart, Robert Pattinson and Taylor Lautner!

Check out everything we’ve got on “The Twilight Saga: Breaking Dawn – Part 1.”

For young Hollywood news, fashion and “Twilight” updates around the clock, visit HollywoodCrush.MTV.com.