Cameron Diaz and Jason Segel serve up three scoops of 'Sex Tape'

Even before they first teamed up in 2011���s Bad Teacher, Cameron Diaz and Jason Segel shared the same no-shame-no-gain approach to comedy. Now the two stars reunite for more awkward yuks in Sex Tape (rated R, out July 18), playing a married couple with kids who decide to revive a flaccid love life by making their own private porno—hilariously re-creating every position in The Joy of Sex—which naturally falls into the wrong hands. What follows is a madcap chase around town, including a late-night visit to the home of a seemingly straitlacedCEO played by Rob Lowe (no stranger to sex-tape scandals himself).

On screen, Diaz, 41, and Segel, 34, prove to be very game—and amazingly limber. Off screen, they were just as playful when we pulled a Coolhaus ice cream truck onto the Sony lot in L.A. last month. Over three scoops of ice cream, the duo bared all about their love-hate relationship with kale, achieving the perfect naked handstand, and unsexy mariachi music. All while keeping their clothes on, of course.

Check out the video evidence below: