The value of any given activity, interaction or relationship is equal to the amount of joy it brings.
The expression of true joy changes the experience of life dramatically. The emotion of joy magnetically and synchronistically attracts us to circumstances, ideas, people and other aspects of Life that are of a similar vibration, which automatically reinforces the expression of joy. Keeping this in mind, the true purpose or goal of any of our expressions then, should be to express joy for all involved in the expression.
In other words, the more joyful we are through our expressions, the more joy we can spread and experience through subsequent expressions.