All these when blended have a great _smoothness_ to the taste, and a relaxing quality to the skin.

The next thing children covet is _fruit_, and of fruits those principally which are sweet; and every one knows that the sweetness of fruit is caused by a subtle oil, and such a salt as that mentioned in the last section.

Afterwards custom, habit, the desire of novelty, and a thousand other causes, confound, adulterate, and change our palates, so that we can no longer reason with any satisfaction about them.

Before we quit this article, we must observe, that as smooth things are, as such, agreeable to the taste, and are found of a relaxing quality; so on the other hand, things which are found by experience to be of a strengthening quality, and fit to brace the fibres, are almost universally rough and pungent to the taste, and in many cases rough even to the touch.

We often apply the quality of sweetness, metaphorically, to visual objects.