You consider yourself the luckiest pony in the world to have a best friend like you have, especially when your best friend is a princess. But when Celestia invites you over to have some tea and catch up on studies, her little sister answers the door.
I don't care if you're black, white, bisexual, straight, gay, lesbian, short, tall, fat, skinny, rich, or poor. If you're nice to me, I'll be nice to you. Simple as that.