Its origins started in Pagan times when the Celts would burn a wooden effigy of a man to convey repentence to their gods in the idea of giving a false sacrifice.
Thankfully, we've disgraced it to the point of where it's just like a 72-hour shroom trip.
"Yes, a bunch of naked, tripping, and rolling weirdos who just want to rub up next to you and say 'Will you be my Buffy-Bear?'. What are we, twelve?"
(Quoted from American Dad (not exactly as said, though))