The pair, who joined the BBC soap as Moon brothers Tyler and Anthony last year, recalled their first experience of appearing half-naked in an interview with Heat magazine.
"When you're in the public eye, though, you feel like you have to keep in shape," Lapinskas said. "You're always under pressure. You can get quite caught up in it and people do become anorexic in the industry.
"When we first filmed in your boxers we walked into our dressing rooms and there were just some boxers hanging up. We rang down saying, 'Our costumes aren't here', and they said, 'Yeah, they are'. I was like, 'Are you serious?'"
The pair, who appear in a strip poker themed photoshoot, are now dating co-stars Shona McGarty (Whitney Dean) and Jacqueline Jossa (Lauren Branning), but insist that they don't bring their private lives into work.
"We don't take our relationships on set. When we get to the gates of the BBC, we're at work," they said.
The full interview appears in the new issue of Heat magazine, out now.
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