yeah no reason to slap a religious label on this, you have to remember that theres 6 billion people in the world today... its pretty likely that some people from all around the globe would see an old woman (and yes i saw this show too its actually an old woman or a "witch" thats sitting on their chests, theres also aliens and stuff but the name "old hag" is from the many instances of an old woman on your chest) and yeah, back in the day old women were often thought of as mysterious thus being evil witches or something... (people feared what they didnt know)

like others said, its just the amazing mind trying to rationalize something it senses the body feeling