The MBC entertainment program 'Infinite Challenge' members Jung Joon Ha and Yoo Jae Suk made fun of each other about whose teeth are uglier.

On the most recent episode of the popular MBC entertainment program 'Infinite Challenge,' which aired on Dec. 12, 2015, the 'Infinite Challenge' members Yoo Jae Suk and Jung Joon Ha visited a dentist's office, member Park Myung Soo had a custom made wig designed for him and member Kwanghee had an acting lesson. Yoo Jae Suk and Jung Joon Ha made fun of each other's teeth and oral structure. Yoo Jae Suk and Jung Joon Ha heard from their dentist that if they start their orthodontics procedures, it would take them two years to complete. They decided not to do it, saying that it would take too long. The MBC entertainment program 'Infinite Challenge' is one of the popular, long lasting entertainment programs in Korea. It features the Infinite Challenge members Ha Ha, Park Myung Soo, Kwanghee, Yoo Jae Suk and Jung Joon Ha.