Humans perceive poetry, rhyme and rhythm specifically, it produces some emotions and feelings that prose cannot do.
Does this indicate an evolutionary trait that evolved under extensive use of poetry in prehistoric times, before writing was invented, for keeping and transferring knowledge?
Since the poetry is easier to remember and allows natural error-correction due to rhyme and rhythm, it could be naturally used to keep knowledge in oral form for practical purposes. And special perception of poetry could be a huge evolutionary advantage of a population, that would allow them to keep more knowledge. This could last for hundreds of thousands of years.