You ended up in Equestria about two years ago, and in that time, you've become quite close with a number of ponies. Of them, Rarity in particular has left a major impression on you. She seems to enjoy having you around, and you appreciate the company.

That said, there is one major roadblock getting in the way of your relationship. More than anypony you know, Rarity is extremely concerned with keeping up appearances. As a fashion designer and all-around fabulous mare, she frequently wants your opinion on how she looks.

Unfortunately for you, you're a human with no way of telling what makes a pony "beautiful."