Twilight Sparkle hears a lot of things from Sour Sweet, who always shows off her fun life experiences. Once, ''Kissing'', is mentioned, Twilight takes interest onto it. After scoring a date with help from Lemon Zest, Twilight had to get some help.
One day, Twilight Sparkle discovers something amazing about her friend Sunset Shimmer. She's a magical talking pony! This requires investigation! Science! Possibly a full-body physical! Or maybe she'll just ask her what's up with that.