Male idols have been flaunting their "chocolate abs" for several media purposes may it be for print ads or a part of their act in shows.
With the strenous schedule, they make it sure to maintain their bodies.
Who is fit to be crowned the most sexiest male group in Korea?
https://www.kpopstarz.com/articles/43350/20131001/sexiest-bodies-in-a-male-k-pop-group.htm