The 38-year-old model made the allegations on Sunday, nine years after the video premiered. Kloss claimed he and Perry saw each other several times after she split with Russell Brand, and that the alleged assault occurred at a roller rink party hosted by stylist Johnny Wujek.
"This one time I brought a friend who was dying to meet [Perry]," Kloss wrote. "It was Johny Wujek’s birthday party at Moonlight Rollerway. And when I saw her, we hugged and she was still my crush. But as I turned to introduce my friend, she pulled my Adidas sweats and underwear out as far as she could to show a couple of her guy friends and the crowd around us my penis. Can you imagine how pathetic and embarrassed I felt?"
Kloss explained he did not initially speak out because he needed to maintain a business relationship with Perry; he decided to share his story to remind the world that women aren't the only victims of sexual assault.
"I just say this now because our culture is set on proving men of power are perverse. But females with power are just as disgusting," he wrote.
Kloss went on to say he only made $650 from his appearance in "Teenage Dream," and claimed Perry's team kept him on a short leash when it came to his interviews involving the singer. He also shared supposed screenshots of emails between him and Perry's camp, who would advise how to answer reporters' questions.
"I was supposed to minimize myself and stay PC to protect her 'image' I listened and was a good boy. The fear sticks with you, when you are censored to protect someone else’s image," he wrote. "But in return treated like a prostitute and exposed in front of a group of her friends and other random people. Then you are shocked and you block it out, because you watch the face of children being uplifted by positive music she sang."
Though Perry's representatives have not responded to Kloss' claims, a number of industry insiders have come to Perry's defense.
"Oh hell no. I’m not about to let you make accusations against my friend like this. This is such bullshit," Wujek commented on Kloss' initial post. "Katy would never do something like that. We all know about your on going obsession with her since the day of filming that video. You were writing her music. And planning an imaginary future with her. It’s not ok to do this to people who have done nothing but uplift and inspire others. Focus on your life and your daughter and move on josh. I’ll be praying for you. We all will."
Jewelry designer Markus Molinari echoed Wujek, insisting Kloss was lying. "Remember you texted me saying how you’re in love with her and you wrote her a song?" Molinari commented. "And how soon you’ll be able to flying anywhere to meet her. You were paid for a job like any other job you’ve had but your obsession with Katy has hit another level. Stop lying to yourself and find peace in your life. Move on."