Only One Thing

You can think of.

The Only One Thing you can't have.

Why, if this is not new, or surprising or unexpected - why, when without a doubt you know better - does it only Make Things Worse?

We want what we can't have, have what we don't want. Human nature, yes, but Why?

Edit: And even if you are so fortunate, you get what you want... You induce the Converse and Vicious Cycle Arguments. Which, in turn, induces the Contentment and Satisfaction Arguments, inducing, third time round, the Priorities Argument. I know - I just like to rant. And wish, if rose-tinted.