excorcist stuff, question Options

[AngryBaby]

okay, thinking of that movie the Excorism of emily rose and all those other excorcist movies and stories. ive always wondered, why and how do u get "possessed". i mean, it was never really explained, and the bible doesnt really answer that question either. can it just.. happen. or do you have to do something?
if this is spam....well um sorry . look at it this way today has been a "spammy" day. so if this is spam, just look at it as another spam of the day i figured this question wouldnt be answered any other way than making it a topic. plus my sister asked me the question so i thought "Hey! lets ask the people of cb! they have all the answers!"

[Death2Smilee]

My religion teacher's StRaNgE, and she explained it:

So, someone who becomes possessed must first invite the powers in, whether it be thourgh ouji boards, witchcraft, etc. Basic contact to the world of the nonliving. You call upon dark forces. Without protection from good forces, like gaurdian angels, you are left vulnereable to attack. Demons, spirits, "evil" angles are called into your body. You can actually have more than one demon possessing your body. The exorcism movies aren't exactly that accurate about what possession looks like; those cases turn up every once in a while, but aren't that common. Ok, so yeah.