Had been reading an article titled "OO in One Sentence: Keep It DRY, Shy, and Tell The Other Guy" from pragmaticprogrammer. A funny sounding title, but the content explains the essence of OO in a more interesting way. I liked a particular paragraph so much that I'll quote it all in verbatim:
"The best code is very shy. Like a four-year old hiding behind a mother’s skirt, code shouldn’t reveal too much of itself and shouldn’t be too nosy into others affairs. But you might find that your shy code grows up too fast, shedding its demure shyness in favor of wild promiscuity. When code isn’t shy, you’ll get unwanted coupling."
This is the best description of OO I've heard of so far.
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