George and Martha are secretly a divirced, married couple.
Think about it. They both do everything together, and they are pretty much the only hippo characters we ever see in this show.
http://tvtropes.org/pmwiki/pmwiki.php/WMG/GeorgeAndMartha
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Think about it. They both do everything together, and they are pretty much the only hippo characters we ever see in this show.