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1.
as stated in Blood on The Bed by Sick Animation

Well son, a coosie is a hole in a woman’s body
And once a month it get’s real bloody
Once a month yeah that’s a fact
But that’s cool cause I like it like that
Dad you got blood on your bed. Why?
Son, that’s from your momma’s coosie
by jdiddy123 November 18, 2007