well firstly I am actually 16, but i tend to get younger, and older people more than kids my own age. In my head there is this deep whistling, when you think of whistling you think high pitched, but this is deep. I cant replicate it, and most of my odd actions are self stimulating, like having friends crush my head with their knees, and stand on my head to squeese it... enough of my stuff, all I have to say is that it is very common

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once a day
the sun says hello
once a day the sun gets tired of our crap, and goes to bed