f(x) reveal their stories about 'pain of their 1st love'

F(x) members revealed their thoughts about the pain they've experienced on their 1st love on the short interview at M! Countdown" before their comeback stage on July 25.

In regards to their title song 'First Wisdom Tooth', which talks about pain of first love, Sulli started off saying that she haven't have her first love yet. She said, "It'll come someday right?".

Luna followed up, "It was really irritating," and Victoria expressed, "It quite hurts but once you passed that stage, it'll be okay again." Amber calmly said, "I'm not sure because I don't really care about love."

Watch below: