He had picked, "What is the scent of your shampoo?" When the other members saw the questions, they couldn't stop laughing, and Ilhoon and Sungjae laughed so hard they turned a bright red, because Peniel has no hair (and therefore doesn't really use shampoo). Eunkwang even joked, "Foam cleanser?"

Check out the interview above and make sure to watch to the end to see Changsub's cute habit whenever he sees Peniel's head.