...If we are mostly made of water and gravity in the form of other planets etc can alter water with tides and seasons, if we can have Seasonal Affective Disorder, if Alzheimers patients can show changes from sundowning... well why wouldn't it be possible that our minds are changed a bit by the world we show up into? I'm a winter blizzard baby and was born into much less sunine and comfort than, lets just say a June baby... it doesn't strike me as unreasonable to think that might be a part of development. Like everything else there are fictional tales made up to explain observations so maybe Astrology is part of that...