@Anonymous: Lisbeth Salander in The Girl With the Dragon Tattoo and Erica Albright in The Social Network are played by the same actress, Rooney Mara. The characters have romantic relationships with Mikael Blomkvist and Mark Zuckerberg, respectively, and the humor in this picture is derived from the absurd notion that by sharing an actress, these characters must be a single individual, as well as the unexpected notion that the nerdy, monogamous Mark Zuckerberg could possibly have multiple STDs.