Our neighbors' daughter had a scream more melodious than my own. At first, Col. Parker had to pay girls to get them to scream for Elvis. I didn't want to scream when I saw The Beatles, but I did. After that, I screamed for even mediocre bands. Late in his career, John Lennon got into Primal Scream.
Many people find it relaxing to scream.
Just as crawling precedes walking, so screaming precedes speech. The ambulance tries, in its clumsy way, to emulate the human scream, which in turn tires to emulate nature. Jim Morrison wanted to hear the scream of the butterfly. With ultra-sensitive equipment, scientists measure the screams of plants they've tortured. It's proven that if you scream at a person for years, then suddenly stop, he will hear even the tenderest words of love as violent curses.