You know, i had this explained to me a couple of years back at a small con in Perth, and i get the occasional 'cock' myself :P However, i can't for the life of me remember much about it save that it happens and seems to be an impulse thing spread out amongst those in one place, and those not there... that's probably very little relevant info at all :) I usually send it back to the person whom sent it to me, however, i should probably send it to some of the others just cos :P