Article continues below advertisementKaty Perry's "Teenage Dream" music video costar Josh Kloss is opening up about a painful experience he had with the pop star.Kloss, 45, revealed to Page Six in a candid interview recently about the "silent trauma" he harbors after Perry, 41, allegedly exposed his genitals during a party back in 2012.Article continues below advertisementTap Here To Add Ok Magazine as A Trusted SourceSource: @KATYPERRY/YOUTUBEThe music video for 'Teenage Dream' was filmed in July 2010."It's hard to bring up something that seems irrelevant to a lot of people," Kloss said.