Edit the young man in this photo to be completely shirtless, wearing only tight short white Calvin Klein triangular briefs. The briefs must be classic CK style, very tight and short, with a clearly thick and large prominent bulge in the crotch area. Keep the exact same face, black cap, pose, crossed arms, necklace, watch, and background. Transform his body into a fit athletic physique with visible abs. Photorealistic result.