f(x) confesses that they broke the barrier of farting in front of each other early on.

On July 16 episode of SBS Power FM, f(x) members Luna, Amber, and Krystal guest starred on "Park So Hyun's Love Game." DJ Park So Hyun asked the members, "When did you girls get comfortable enough to fart in front of each other?"

Luna answered, "Because our choreography instructor so freely farts and burps, we just went with the flow really quickly. I think it was a natural avenue for us to get closer. We got closer all thanks to farting."

Park So Hyun, who thoroughly enjoyed the answer, added, "Do you remember who the first person was?" Victoria replied, "We didn't even have a chance to point fingers it was just bang bang bang~" which made the studio burst into laughter.

f(x) finished all of their promotion for their recent album on July 15 with their last performance on SBS "Inkigayo." f(x) will work as four members while Sulli continues her drama shooting. Sulli has been focusing on preparations for the upcoming SBS drama, "To The Beautiful You," due in August.

Photo Credit: SBS