The marginal cost of doing something 'just this once' always seems to be negligible, but the full cost will typically be much higher. Yet unconsciously, we will naturally employ the marginal-cost doctrine in our personal lives.

The personal threat is something that's always been a part of our lives.

In our personal lives, we have a lot of businesses going on. I have a profession, I'm a father, a spouse, a good member of my community. How much of my time and energy can I allocate to each of those things? What I allocate becomes the strategy I have for my family, and everything else.

Justification for infidelity and dishonesty in all their manifestations lies in the marginal cost economics of “just this once.

I don't judge people on their personal lives.

But it kills me, this fascination with celebrities' personal lives.