Afraid to take a dump on public toilets because of their unsanitary nature. A common phobia in most people except for trailer park people and hobos that give out rimjobs.
"My shitphobia really gets going when I see pubic hairs on a public toilet.
An unreasonable fear of the unknown (i.e., surprise). Manifests as compulsions to circumvent due process in the pursuit of spoilers. Note: such spoilers do not reduce net enjoyment. Instead, they increase it.