The 32-year-old singer opened up about the paparazzi photos seen around the world from their vacation in Italy last August in a new interview with KIIS FM's Kyle and Jackie O on Wednesday, and said the actor actually asked her to get in the buff too.
"He asked me if I wanted to be [naked] and I was just like, it's one of those things where I was like, 'Oh nah,'" Perry said. "Just not in the mood."
However, things did get steamy between the two on their private yacht.
"You know when you're dating someone sometimes, it's exciting to be like, 'Oh, should we try and make out over here in this place?' or what have you," she said. "And I was just not in the mood. I saved it for the boat!"
Earlier this month, Perry ranked her ex-boyfriends during her 72-hour YouTube livestream to promote her new album, Witness, with Bloom coming in second to John Mayer. Watch Perry's shockingly candid confession below: