+[TODO: but species differences also make them frustrating]
+
+At this, some extremely naïve novice students of historical mammology inquire: [TODO ...]
+
+To which it is replied:
+
+A few particularly naïve students inquire further: [TODO ...]
+
+To which it is replied: there's _no reason whatsoever_ for evolution to select for that, _dummy_. What's wrong with you?
+
+And so, many, many times in the days of auld lang syne, a squirrel in a burrow or a tree would sadly settle down to rest for the night, lamenting, "I wish I had a special friend. Someone who understood me. Someone to share my secrets with."