It's not fluff, I know I had to deal with possessions involving my friends younger brother, the dimwitted moron accidentally summoned and got possessed by a Jumaaon a lizard, jaguar, humanoid monster from Hell.
By: WhiteRav3n / Knowledgeable Nov 18, 2012
Post # 4
It isn't fluff. Even a normal spirit can "ride" a physical person. Usually it happens to natural mediums that don't know that they have the gift and therefore don't know how to control it. Spirits take advantage of such people. The person starts off having urges and desires not of their own. Then they may say or do things that are unlike them and then not know why they did it. Full unconsented possessions (being taken completely over) are rare but they can occur. Usually such things occur when someone dabbles in summoning without proper knowledge/experience or when someone has a weak will (depressed, substance abuse, suicidal, etc).
i dont believe that they can posses you as in jump in to you and control your body but i believe that they can sort of talk to you and make you do thinks by influencing your emotions and by talking to you (in you mind) so you think the spirits/entity's voice is your thoughts (think of it as the little angel and devil on the shoulders of cartoon characters but it is the entity),
i also believe that if you are negative (say angry all the time for a long period of time) the anger can take you over and that is what is mistaken for possession. but still these are just my thoughts and views on the subject.
also adding on... i agree that if you are a medium then they can take over you like that like "step" into your body only when your in a trance like state but when you get out of the trance they are "kicked" out of your body and they have no control over your physical body.