The cast of '1N2D' had headed over to Ewha Woman's University to give special lectures, and Jung Joon Young's lecture, titled 'Am I a Bad Guy,' focused on love and relationships.
The singer said, "I think I am a very self-centered person. I always have to be happy and I try to spread happiness by making the people who hang around me happy. But I get jealous when my girlfriend meets her guy friends often, and when she sounds cold telling me that she's tired, I can't do anything for the remainder of the day," revealing that he's actually very fussy and even timid at times.
Jung Joon Young explained that women tend to feel overwhelmed when they are in relatioships with him, saying, "I determined that I shouldn't do relationships anymore. When I'm in relationships, I think I'm going to treat [the girl] badly again, and once we break up after some time, I feel like I'm going to feel regretful and apologetic. I didn't like that vicious cycle."
When a student asked him, "When do you think about your ex the most?" Jung Joon Young replied, "I thought of her as I was talking, and I think of her listening to the songs I wrote which were inspired by her."