Thinking about oneself invokes the logic of consequence: Will I get sick? Doctors and nurses can answer swiftly with a no: I spend a lot of time in a hospital, I don't always wash, and I rarely get sick, so this probably won't affect me. In general, we tend to be overconfident about our own invulnerability to harm. But thinking about patients prompts a logic of appropriateness: What should a person like me do in a situation like this? It changes the calculation from a cost-benefit equation to a contemplation of values, of right and wrong: I have a professional and moral obligation to care for patients.