Lee Joon revealed men shouldn't be paying for everything on a date.

On the June 13 episode of KBS 2TV's 'Happy Together 3', the MCs asked him, "You're famous for being tight with your money, but are you frugal when having a girlfriend, as well?". Lee Joon answered, "No. When I'm in a relationship, I spend money."

However, he reminisced about his previous girlfriend, saying, "But both my girlfriend and I were students, so we would usually split the bill. For example, when we would go out for dinner and a movie, I'd pay for whatever activity was more expensive." When MC Park Myung Soo asked, "Didn't your girlfriend not want to pay sometimes?", he answered wisely, "We were in the same situation, as students who didn't make money. Making the guy pay for everything is being sexist."