The popularity of vampire Edward and his family in the "Twilight" series of books and movies played a part in Pittsburgh Ballet Theatre artistic director Terrence S. Orr's decision to include Dracula in the current season's offerings. And don't forget, it is a love story. So its Friday-Sunday run is just in time for Valentine's Day. Well, that's true, Orr said with a little laugh. It was a nice change-up with Edward and it is usually performed around Halloween. Dracula is a love story. Why do people want to live forever and what are they willing to do to accomplish that? It's also been very successful for us.