One thing writer/director Stuart Blumberg (The Kids Are Alright) has going for him in his directorial debut, Thanks for Sharing, is that the subject matter on which the film is centered, sex addiction, is something seldom explored. Steve McQueen’s bold but brilliant film Shame – released last year with an NC-17 rating – dealt with it, but the approach and tone between the two are so different it wouldn’t really be fair to hold the two films in comparison. Thanks for Sharing is a romantic comedy based around three main characters and their lives dealing with sex addiction. The three men are all part of the same sex addicts anonymous group,…