"It's been a fun shoot," Jonas says, "and my first time doing [a campaign] in underwear, so it's pretty exciting."
To get ready for the photo shoot, Jonas did "a lot" of boxing with his trainer. "She put me through the ringer."
According to Jonas, the shoot has been "a fun, exciting, kind of life-changing experience."
"What I know of Paul Marciano is, obviously, he's an icon," Jonas says. "It's amazing to be a part of this."
"The shoot today was a lot of fun," Jonas says. "Yu Tsai always does an amazing job and keeps you laughing."
"Even though I've been doing this for four years now," McKinney says, "I still have to pinch myself coming into work."
"It can be a weird thing to be sitting there in your underwear being photographed," Jonas admits, "but overall I had a blast."
"They've always been an amazing, iconic American brand," Jonas says of GUESS.
"It's always been on a to-do list to get in shape and do something like this," Jonas says.
McKinney describes GUESS as "iconic," "sexy" and "confident."
After his workouts, Jonas says, "You just kind of are thrown into it."
"I've been able to watch him work," Jonas says of Tsai, "and now to actually be in front of the camera when he does his tricks, it's awesome."
"To be in the GUESS family," Jonas says, "feels good."
"Everybody on set was great," Jonas says. "You feel comfortable."