&gt; But I don&#x27;t believe that this fear is wrong on my part and that I should do something about it.<p>I agree. And I think the article is saying the same. Fear (the emotion) is an appropriate response to numerous things, including someone entering your personal space.<p>My response, poorly worded, sorry, was intended to say that a fear <i>response</i> is different from <i>fear</i> (the emotion). Even a non-stranger could elicit a fear <i>response</i> from you, even a trusted person or lover, by entering your personal space. But it may not trigger the <i>emotion</i> of fear. That is, if I know you and trust you, you could be in my face during a conversation. I wouldn&#x27;t fear you or the situation. But I may still experience the heightened senses, the increased heart rate, due to your proximity because of a physiological response (fear response).