Many of us would love to believe that we are completely rational beings in the sense that we are able to navigate a world strictly categorized in terms of necessary and sufficient conditions. Many of us would also love to believe that with sufficient will power all of us can move beyond unwanted emotions and beyond images and thoughts that "don't belong." That description does not comport with reality, of course. Several psychologists once conducted a hilarious experiment: Students were shown a brand new bed pan. Apple juice was poured into the brand new bedpan out of a commercial bottle of apple juice. The students were then asked whether they would drink the apple juice out of the bedpan. Only 28% were willing. My source for this experiment is page 216 of Heuristics and Biases, by Thomas Gilovich et al. You see, we seem to think as connectionist beings and emotional beings, as well as rational beings. Even though we logically and rationally know that we aren't drinking urine, the visual stimuli too strongly suggest otherwise, at least to many of us. I have written the above as prelude for describing a gift I recently bought for a good friend. A few months ago, I had described a toilet-shaped mug offered for sale by a well-stocked internet novelty company called PrankPlace. My friend indicated that he would not be deterred from drinking out of such a mug. I decided to put his confidence to a test. Today, I handed him his new toilet-mug and he was delighted. He promptly filled his new mug with coffee, and drank from it. Though he successful drank his coffee, he admitted that it was a bit off-putting to drink from the toilet-shaped mug, even though he absolutely knew that drinking from it would be nothing like drinking from a toilet. I think there are serious lessons here. For instance, when one claims that he is not "racist," there might yet be images and emotions haunting him, things that he acquired as a child, that no amount of logical and rational thought could purge. And maybe we viscerally dislike someone because she reminds us of a teacher that we disliked (even though we are certain that she is not that teacher). We are complex beings that are often not capable of defining and rationalizing our way out of disturbing or disorienting situations.