Time and the Degradation of Morality

Is morality just a matter of time?
As we proceed along our timeline of life, our sense of morality develops and grows alongside of us. But does that mean that it also degrades as time progresses in the same way that our bodies degrade as we get older?

Many of us start out with a particular notion of what is moral and as we age we become more inclined to be lenient with that notion. For example, when we were in grade school holding hands was next to scandal. What is it now? Something we view as oddly childish and...elementary. We are taught as young children that lying is a cardinal sin. When we are older we decide that sometimes a lie is acceptable or even necessary. Those of us who were once clung to the straight and narrow road of abstinence and sobriety see their values changing little by little. It is this evidence that the advocate of a slippery-slope argument for the preservation of morality base their most potent attacks. And yet there must be a thin line between moral integrity and personal growth.

At some point we all gain the cognitive ability to judge the precepts that we have been taught and decide to maintain or discard them. In a society where personal growth is a marketable commodity and moral preservation is either an idyll constantly punctured or an earmark of stagnancy will we eventually be left without a standard to support our society?
In just the way that each person is said to have a price, do we each have a time?