Actor Vince Vaughn has made a name for himself by starring in plenty of raunchy comedies, but when it came to writing his new movie, “Couples Retreat,” with his buddy Jon Favreau, he didn’t want to specifically develop the movie with an R rating in mind.  And what they wound up with was a PG-13 movie that feels just right to Vaughn. (CLICK ON THE MEDIA BAR BELOW TO HEAR VINCE VAUGHN)