The Na'vi aren't mammals, right? No need to breastfeed, no need for nipples. So how come Zoe Saldana's character, Neytiri, has a pair of pixelated breasts?
James Cameron has already told Playboy that "Right from the beginning I said, 'She's got to have t-ts,' even though that makes no sense because her race, the Na'vi, aren't placental mammals."
But that still doesn't answer the question—why?
Turns out, according to Cameron, that it's all our fault.
As reported by The Huffington Post, when pressed for a better explanation by interviewer James Lipton during the taping of an upcoming episode of Inside the Actors Studio, Cameron said, "Because this is a movie for human people." Which he further explained basically means, "Let's focus on things that can create otherness that are not off-putting."
What do you think? To get you into the theater, did science have to go out the window?