Two White Slits And One Dark Rod

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<iframe title="Two White Slits And One Dark Rod" scrolling="no" width="600" height="476" src="http://www.smutinc.com/videos/embed/60616" frameborder="0"></iframe><br /><a href="http://www.smutinc.com/videos/60616" target="_blank">Two White Slits And One Dark Rod</a>. Provided by <a href="http://www.smutinc.com" target="_blank">smutinc.com</a>