D.O revealed that he got cursing lessons from Jo Jung Suk!

He, Jo Jung Suk, and Park Shin Hye had an interview with 'SectionTV' for their upcoming movie. During the interview, Jo Jung Suk said, "The character curses a lot, but I'm not very good at cursing. But all of a sudden, I got really good at it. It's all the results of practice."

D.O added, "I got lessons from Jo Jung Suk-hyung on cursing. I learned pronunciation and attitude, and all of a sudden I got really good, too."

If you want to see Jo Jung Suk and D.O cursing, make sure to check out their movie 'Hyung'!