Music from various traditions has a conversational quality to it - making statements, revising them, making asides, listening to a response, and coming to a conclusion. They mediate song production. The left descending pathway plays a more important role in singing than does the right, duplicating the left-hemisphere dominance in humans. A single pitch sounded alone is seldom evocative. Although it is said that people with perfect pitch are not necessarily blessed.
Most cultures seem to like precise intonation but also like to experiment with it.
Intervals between notes is what gives music its shape - in fact, its essential criteria. Notice that the two notes are exactly 3 full steps apart. For me it's a slightly weird sound. Anyhow something needs to happen with that sound, it needs resolution, it demands that the other shoe drop. Play F and B or B and F together then play a G underneath it.