Funny, vulgar, raunchy. That’s “Blockers” in a nutshell. The film earns its R-Rating right from the start, as we meet three parents (John Cena, Leslie Mann and Ike Barinholtz) who are on a mission: to stop their daughters from having sex on prom night. It’s a silly set-up, and on paper, it doesn’t seem too promising. But leave it to writers Brian and Jim Kehoe to turn the familiar into something new, at least for a while. And under Kay Cannon’s direction (who also wrote “Pitch Perfect), the movie veers from hilarious sexual set-pieces, to thoughtful moments about becoming an adult. One of  the film’s strongest assets is its three leads, who truly deliver the goods scene after scene (who thought John Cena could be this funny?). Part of me still wishes the film was even funnier, but that’s a small price to pay for a movie that’s meant to entertain, and delivers. “Blockers” may not be revolutionary, but I had a good time watching it.