It's suprising what things will bug a person. I've been a sysadmin since 1990, and in that ime II've seen a LOT of very gross and innappropriate stuff that people have tried to hide on systems I was responsable for. And even more from just random web browsing and viewing of Usenet "news". And almost never have I had a physical response. But that icon certainly triggered something, and that leads me to wonder why. Why does that image have such a strong effect on me when others have not.
Have any of you had physical responses to images? If so, what sorts of images do that?