I cannot give you a certain answer myself, that's for sure.
It's been a curiosity of mine fairly recently. Some people, when creating their scrapbooks, like to put in lots of glitters on some pages. Now, what is it with glitters? Why isn't it as attractive as when you put in bits of used newspapers damped in the same color?
Why do people give jewelry higher value than anything else? You know you are facing someone affluent (or a show-off) when he/she is already turning the color of his jewelry. Aside from their rarity, it's most probably because of their shininess, or their glitter. But what is it with glitter and shininess that makes something more valuable than non-shiny things?
It is my hunch (yes, it's just a hunch) that it's because shiny things reflect light that goes into it. When light is reflected, it turns back to our eyes, and our eyes naturally like light.
Moreover, these shiny things emit light of their own, so when that 'mixes' with light, you have a 'colored' light going through your retina. When many light beams go to your eyes at different times, that's when, I guess, we are attracted.
It does seem to be a very simplistic explanation, but I believe there is some truth in it. As for a scientific explanataion, I guess a psychologist would be the best person we should ask.
In case you are wondering, Office 1000 also has a lot of shiny, glittery, attractive in our inventory that we will show you later on.