Kramer has drastically different opinions on cleanliness than his friends. He believed it was critical to be in the shower for an hour to reach optimal levels of cleanliness. Jerry and Elaine get by with ten minute showers and give him a few tips to improve his showering efficiency and technique.
Raven's class partner, Ben, has an unbearable body odor that completely repulses Raven. She wants to tell him that she cannot work with him because of it but has trouble doing so because he flattered her with a compliment.
Father Flynn coaches the boys basketball team and takes a moment to talk about the importance of cleanliness. He walks around the court showing the boys his nails so they understand that he holds himself to the same standard that he expects of them.
When Double D's shower is being renovated, he has trouble getting his day off on the right foot. After repeatedly being denied a shower from the other kids and accidentally getting himself dirtier in the process, he loses his mind. He completely neglects his well-being and embraces throwing trash on himself.