User blog comment:Holly Bailey/Thing I'm Afraid Of/@comment-24234841-20170220182743/@comment-25947144-20170220183555

Hmm, I'd guess the fear of spiders probably comes from their form: a weirdly shaped, multi-eyed mass carried by 8 slender legs. It's something your brains finds very abnormal and creepy. A big part of the fear probably comes from the irrational fear of being bitten (or rational, if you live in Australia) and the fear of their crawling in various places. Maybe in your orifices.