Yes thats very true.. but when you get emotional.. rational thinking sometimes is pushed aside. As in.. you get to know someone and you find your starting to care for them. For the sufferer.. I'm not sure.. but having someone care for you and see the "you" rather then the PTSD illness can be something you have desired for awhile? As in.. no one wants to be lonely! And as a person getting to know a sufferer they most likely don't know much about the illness I would think.. so don't really think much of it at first. And they might just assume the sufferer is already working on themselves with no understanding truly what is involved?