Spike has grown over the years, and after finally realizing he'd be better off looking for companionship among those closer to his age, he asks Sweetie Belle to be his marefriend. She accepts, but they only tell Applebloom and Scootaloo, and so keep everypony else out of the loop, including Rarity and the other Elements of Harmony.
However, on the day of their first "real" date, Spike gets cold feet and doesn't know what to do. So, he decides to ask around his friends and various Ponyville residents about how to act on a date, and such how to properly treat a mare.
The results are... less helpful than he expected.