This is an interesting article regarding the origin of pleasure in music. It also indicates the pleasure of CW as a communication mode comparing CW to music. This analogy between CW and music is possible due to the fact that each intellectual activity is based on expectancy.
The author of this review says the cortical loop between the auditory center and the frontal cortex enables recognition of the structural regularities in music pattern. The limbic system is involved in rewarding and pleasure. The connectivity between this nucleus accumbens and the cortical loop shows the level of pleasure through expectancy.
The fact the pleasure of music comes from the expectancy and the sense of rewarding as a result of expectancy attracted my eyes a lot. I enjoy both music as well as CW. This study result coincides with what I feel with both.
It may deduce that the meaningful conversation on CW communication is the source of pleasure in it. Without meaningfullness, CW communication should be just exchange of symbols which won't require any expectancy. This exchange of symbols would not be associated with any pleasure inherent to conversational CW communication.