OK, I have one: Why do (some) girls scream at absolutely everything?

like when a song comes on that we love... or when we see a spider within 50 feet of us... or when we see a friend that we haven't seen in a while.... or when some one hits us even if its softly... ...

all those emotions and others are wired to that infernal scream reflex. it's kinda grating, lol.

define grating....

1 : archaic : ABRADE 2 : to reduce to small particles by rubbing on something rough 3 : FRET, IRRITATE 4 a : to gnash or grind noisily b : to cause to make a rasping sound c : to utter in a ...