I hear voices all the time, whether there are bodies to them or not. I've had them for as long as I can remember, which honestly isn't too long. The voices have pretty much taken away my memories of when they weren't here. I don't mind, though. The ruined streets of Ponyville are empty every day, and I have no clue what happened to the ponies. I can't remember... It doesn't matter though. I have the voices to keep me company. They can get too loud sometimes, though.