To have a phobia of dog poop?
I suffer from mild OCD when it comes to cleanliness, and have a particular fear of contamination from dog poop. When I was young my mom told me you can go blind from accidentally ingesting it or getting it in your eyes. This is due to the eggs of the roundworm parasite, Toxocara Canis which can live in the intestines of dogs are are subsequently pooped out.