(Applejack/Fluttershy, or "Appleshy" relationship)

Fluttershy scares easy, and that's awful when her friends are pulling her on adventures while she's trembling, hanging back and wanting to be home.

Fluttershy scares easy, and that's wonderful when Applejack is against her, pushing her and making her breathless. Fluttershy likes her own trembling then.