Those CK masturbation rumors have been around for as long as I can remember, but I always assumed they were bullshit. It seemed like an easy rumor to start because he just looks like a schlubby pervert. Like the Richard Gere gerbil thing or Marylin Manson removing a rib to suck his own dick. They're just believable enough because of who they are.
Bad read on my part I suppose.