If a picture’s worth a thousand words, can a title be worth ten cocks? Boasting as high a concept title as they come, Troy Christian and Robert Schrock’s film “Naked Boys Singing!” preserves the long-running musical revue for posteriority with great cheer and technical indifference, including among its sixteen songs “Gratuitous Nudity,” “The Naked Maid,” “The Bliss of Bris,” “Robert Mitchum,” “Perky Little Porn Star,” “Nothing But The Radio On” and “Members Only.” The clumsy filmmaking and loud sound suggest another title: “Full Frontal Junk.” In case you look away, “Naked Boys” has the best closing credit line item of any movie coming out this week: “No actual penises were harmed in the cutting of this movie.” 84m. (Ray Pride) Music Box