This is the only answer to the question that was asked. And it's a good answer.
What 1337biz might also want to consider from the other answers is the attention to detail. To both find detail in your description of the day, as well as in the details of the person you're talking to. Facial expressions change, breathing changes, eyes shift. There's a constant flurry of happening upon which you react, by altering your story. In IanCal's case about talking about bits of tech to their wife, for example, the wife could be seen trailing her eyes away slightly, meaning she might now already understand what a framework is, or she might frown, when it's just a little bit too technical, or her eyes might shine, when she wants to know more.
I am probably underestimating that there are a million and one different ways to convey something with just one eyebrow, and luckily the human mind is quick to extra-, and interpolate these meanings.
What 1337biz might also want to consider from the other answers is the attention to detail. To both find detail in your description of the day, as well as in the details of the person you're talking to. Facial expressions change, breathing changes, eyes shift. There's a constant flurry of happening upon which you react, by altering your story. In IanCal's case about talking about bits of tech to their wife, for example, the wife could be seen trailing her eyes away slightly, meaning she might now already understand what a framework is, or she might frown, when it's just a little bit too technical, or her eyes might shine, when she wants to know more.
I am probably underestimating that there are a million and one different ways to convey something with just one eyebrow, and luckily the human mind is quick to extra-, and interpolate these meanings.