National Ringworm Association is a company that gives awareness and treatment for ringworm disease.
Homer comes home to a dismal home. He his currently infatuated with his co-worker Mindy Simmons and is struggling to stay faithful with Marge. However, when he returns home one day, the family is a mess, further putting him off. While watching television with Marge, Eye on Springfield plays and gives suggestive messages that he cheat on Marge. Than the National Ringworm Association advertisement appears, which consists of many attractive women working out and wearing clothes that reveal breast and butt. "Just Do It" than appears upon the screen. Homer takes this as a message and is scared out of the house. Upon his departure it is revealed that it has nothing to do with sex, as it reads: "National Ringworm Association (The Other N.R.A.)"