The boy group guested on the August 21 airing of the radio show. Following the broadcast, Song Min Ho and Kim Jin Woo had to leave lip prints on each other for a penalty in losing a game.
Wearing bold red lipstick, the two members braced each other for a peck on the cheeks and on the neck. Meanwhile, WINNER's new track ''Island'' was banned by KBS for its ''homosexual innuendos''.
As this took place in the KBS Cool FM studio, fans are finding the irony quite humorous and commented, "I love my rebellious sons."