On January 9 episode of SBS' television show 'Running Man', the penny-pincher side of Kim Jong-kook was seen.

He continued, "Even if it's too hot or cold, I just live with it. It's not a big deal for me."
In response to this, Ji Suk Jin commented, "Are you going to live like that even after you get married?"
Kim Jong-kook laughed and answered, "No, I'm saving up for my wife and children right now."

Yu Jae Seok excitedly said, "Oh, look at that! She's the perfect wife for Kim Jong-kook! She's so great at 'saving' stuff like you, Jong-kook!"
Then, all the other members of 'Running Man' joined him and started going on about how great fit they were.
As they went on, Kim Jong-kook and Song Ji-hyo just laughed, then shyly smiled, not knowing what to say about it.

(SBS Star)