First:
read the week's worth of cartoon strips that starts here:
http://www.gocomics.com/pearlsbeforeswine/2014/06/02
Second:
take a look at Pearls Before Swine creator Stephan Pastis's Facebook post of June 6, 2014--and follow the link through to read to his blog post about the same topic.
https://www.facebook.com/PearlsComic