Just to clarify, by "manipulation" I am referring to using photoshop etc to modify/brighten colours (so an object looks better/brighter), alter what is in the image, reduce or remove objects you don't like (I am not including minor photo shopping or long exposures)
As an example, magazines and portrait places. A person gets photo's taken, they are then "manipulated" to make said person look beautiful/thin/longer, fuller hair etc. You are who you are and changing what you look like in a photo isn't going to change what you look like in real life