*twigs onto his cryptozoology addiction*
Well, that's probably true but there is a possible other reason. In actual werewolf myth the only way to tell the diffrence between a real wolf and a werewolf was...the werewolves didn't have tails.
Tells you how far we've skewed the view of werewolves in the last century doesn't it?
Consider that your little bit of useless trivia for the day.