I was behind a woman at walmart today who had a back-of-the-neck piercing. Due to my particular set of circumstances, that gave me the oogies like you would not imagine.
Anyway, it was nasty because the bar thing was too wide for the piercing and she had a good half inch of the flexible middle part sticking out on either side of the back of her neck. And that middle part was caked with indescribable grossness. I think some of it might have been pus.
I chickened out on taking a covert pic because she looked like the springer type.