What does the warhorse perk do?

The description just says "Your horse won’t shy at nearby foes, at least as long as no one hits him. "
What does it mean “shy at foes” ?

These descriptions should be more… descriptive. This is too vague.

Sometimes when you´re riding on your horse and enemies come closer your horse get´s scared, throwes you off and rans away. With the perk this only happens when enemies hit your horse.

Thank you!

I feel the same with the “Magistrate Perk” the perk states that it helps my reputation with others “And” improves your speech when talking to a guard after committing a crime.

However…Perk 2 & 3 of the Magistrate perk, it only states it gives you a speech bonus to talking to guards…

Question is, how does the magistrate perk help you talk to others, other then the guards?