Mood Wings - Observations on Pegasus Body Language.

When Twilight Sparkle finds this book, she discovers an entirely new field of research. The secrets of pegasus wings lie before her, and she insists on making her own observations on the matter.

How?

Field research, of course.

Twilight Sparkle has every intention of crawling in to her freshly cleaned bed sheets.

So why is it so hard to get there?