The supermodel graces the cover of Cosmopolitan magazine, where she poses naked in a bathtub in the issue and spills on having sex at 30,000 feet.
"We were on our way to Thailand to see my parents, flying commerical first-class," the 28-year-old says. "We were under a blanket. We weren't even in one of those pod things. I feel like we should get a trophy for that."
Hmm, or a citation for public indecency depending on your taste, we guess! Chrissy also explained how playing it cool helped her guy commit.
"Never once did I ask, 'What are we?' Marriage was never my goal, because I've never been very traditional. I was just happy to be with him," she shares. With a girl who's down to get wild in public, we're sure the feeling is mutual on John's behalf, too.