Did you know that the idea of a "Unicorn" most likely came from stories of Rhinoceroses reaching Greece through Persia and being twisted into a mythical creatue? Indeed, early descriptions of unicorns describe them as having elephant feet, donkey tails, etc., which certainly sounds more like a Rhino than a horned horse.
In fact, when Marco Polo encounter Rhinoceroses himself, he claimed that he had encountered unicorns and wrote this:
>They delight much to abide in mire and mud. 'Tis a passing ugly beast to look upon, and is not in the least like that which our stories tell of as being caught in the lap of a virgin; in fact, 'tis altogether different from what we fancied.
Point is, this is quite fitting for how idol unicorns behave. You believe yourselves to be graceful creatures, protecting the purity of virgin maidens. But the truth is obvious to everyone else forced to share a space with you: You are brutish, ugly creatures, spending your time doing little but wallowing in filth.