Heechul talked about the secret to the successful viewer ratings of MBC's 'Real Men.'  He pointed out how the viewer rating would increase whenever they had a female narrator.  When IU was the narrator, the rating was at an impressive 18.8%. It was 17.4% for Suzy, 17.8% for singer Park Ji Yoon, and 17.5% for Kim Sung Ryul. On the other hand, the show achieved lower ratings of 13.2% when Baek Chul Soo narrated and 12.6% for Kang Suk Woo.

Heechul said, "One ambiguous part is when singer Lee Eun Mi narrated, the show got 14.5%, which is in-between the two extremes.  Maybe because her voice is rough."

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Fellow cast member Park Ji Yoon suggested that this disparity may be due in part to 'Real Men' having a dominantly male audience.