Twilight has always been very good at completing lists. Now, after getting near the end of the biggest list she's ever made, Twilight decides to treat herself in a very personal way that would make Celestia blush.
You personally don't believe in Valentine's Day. Thinking it's real reason it exists is to increase the profit of card and flower companies. To you, the holiday is meaningless. Many would say you're just sour you have nobody to spend it with.