Amy: As you know, I had planned a traditional evening of romance and gifts.
Sheldon: Yes, and as you know, I planned to pretend to enjoy it. I've been working on this facial expression all day.
Amy: And I appreciate your effort, but upon contemplation, I decided I was being selfish. So, I canceled our dinner reservations and came up with an even better way to celebrate Valentine's Day.
Sheldon: What is that?
Amy: By doing none of it. No dinner, no romance, no gifts. We stay here, order a pizza and watch one of your beloved Star War Trek things.