A first kiss is supposed to be magical. In this case, it is, but Scootaloo has no idea why. Turns out nopony has had that talk with her yet, and she certainly hasn't figured it out for herself.
No matter how amazing and talented a pony may be, she will always be missing at least one aspect required to be "perfect". Lightning Dust, believing herself to already be the pinnacle of ponykind, struggles to find the missing pieces.