Going off topic here but I go to hear a lot of live music, all kinds from classical to rock. Whooping, whistling and shrieking are becoming more and more common as ways of expressing appreciation whatever the genre. A few months ago, I went to a tiny theatre to hear a very gentle acoustic set from a well-known musician - folk and soft rock. The guy three seats along from me whooped, whistled and shrieked at the end of every single piece. It felt entirely inappropriate for the setting and my ears were hurting from the assault. I saw the performer look across and frown several times. Why do people do this? Is it simply attention seeking and if adults cant stop themselves from shrieking it is any wonder that children do it?