i think people do that so they can look at their night critters?  pod-o-vision. 
		
	
		
		
		
		
			
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				-Quinn 
 
Man, n. ...His chief occupation is extermination of other animals and his own species, which, however, multiplies with such insistent rapidity as to infest the whole habitable earth, and Canada. - A. Bierce, Devil's Dictionary, 1906
			 
		
		
		
		
	
		
		
	
	
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