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On the September 29 airing of KBS 2TV's 'Vitamin', Kwanghee was tasked with telling apart two glasses of milk. One regular glass, and one glass of milk whose expiration date had passed about 5 days. Kwanghee had to taste both first, then hand the correct glass over to Dal Shabet's Woohee, who had to drink the glass Kwanghee chose without questioning. 

Kwanghee confidently chose one of the glasses, saying, "Sommeliers can tell just by looking at the color", then handed the glass over to Woohee. However, once Woohee drank the milk, her expression clearly seemed to state that Kwanghee had chosen the wrong one. Kwanghee mulled over his mistake by saying, "What will Woohee do? She has a recording today. She's an idol but now she has to keep running to and from the restroom. Even though she'll have a mic on." 

After considering, Kwanghee then suddenly stood up from his seat and told Woohee, "I'll take responsibility. Let's get married. I'm good at cooking, too," proposing(?) to Woohee on the spot. The panelists around them burst into laughter, because, that's just irrational, right?