Katy Perry's "Teenage Dream" music video costar Josh Kloss said he endured "silent trauma" after she allegedly exposed his genitals at a 2012 party. "Some people believe that if you're pulling people's pants down at a party, you're pranking them and it's normal," Kloss, 45, told Page Six in an interview posted on Friday, April 24. "She had risen to complete success with the music video, everything was going well. ... I freaked out [when she pulled my pants down and I said], 'What the f*** are you doing?' I freaked out and she laughed.