-snip-
Step 1 is where the confusion is.
I don't see how I can explain that any further.
That is where perspective comes in. One person may not like something and may wish to unsee it. While others, at the same time, may not care for it and don't need to unsee it for they already have..
What are those things D:
Like your picture in the Facebook topic.
http://www.youtube.com/watch?v=Svx2ITzaYCE#t=5m23sit cannot be unseen.
It is not something specific, it could be anything. It could be your foot; it could be blood; it could be a festering corpse; just whatever a person finds disgusting.
But that's not disgusting :o
That is where perspective comes in.