Writing about music is like talking about feelings - there is no clear way to describe your urges, because the experience is so subjective in nature.
Music moves us in such a primeval way. It is ritualistic origins of rhythm and dance, it is the expression of ideas which cannot be verbalized.
Improvisation. Extemporization. In conversation, we do this daily. The stating of a given theme, feeling for the parameters of the discussion. Moulding to the ideas of another, assimilation, digression, recapitulation, argument, reconciliation, and the occasional, beautiful sense of synchronicity.
There are no guidelines for conversation. Even introductions are not prerequisite - more of a polite formality in many regards. The conversations between friends can start at any point, due to an established familiarity. There is repertoire, themes are innate, jokes shared, jargon understood. Intuition allows for a free range exploration of subject matter.