As I listen to the episode, I begin to realize that we were very nearly describing the hedons and dolors of Utilitarianism--units of unmixed pleasure and pain. While in any given moment one can experience both pleasure and pain, a particular feeling is either pleasureable or painful.
I'm not sure this is a useful path to go down, but it's probably worth addressing because I can see this being a source of confusion given the differences between Epicurean philosophy and Utilitarianism.