Actor Yoon Si Yoon sat at SBS powerFM's 'Lee Kuk Ju's Young Street' on April 20 (clearly the DJ was MIA as you can see by the hilarious screenshots above), making this his first appearance on radio since leaving the military back in January.

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When asked which girl group he liked while in the military, he reiterated, "I said this in the past: MAMAMOO."  When asked why, he explained, "They sing well.  Despite being rookies, they had this energy that seemed like they had practiced a great deal, which I liked."

He then went on to say, "People think that at the military, you would like all girl groups, but this is not true.  Because you won't be able to see them anyway, your standards go up. You judge them from the eyes of a critic, and it changes once every one to two weeks.  If they're popular in the army, they will rise outside [of the military] for sure.  It's extremely fast."