As anyone who's ever contracted it knows, lies are an infectious disease. They slip under the almond slivers of your fingernails and into your bloodstream.
Every time I have people over, I watch how long they look at every part of the painting, or pictures on my computer. I have a few close friends and people that are constants. Whether I like their opinion or not, I've been hearing it for a long time and I can use it as this constant. I mentally pay attention to how long they look at every image, which ones they pause on and what parts of it they look at.