When you smile, are your lips the only thing that move? Does your face remain entirely still, your body stiff, with only your lips arching into a grin? Nope. So why write your characters that way? One of the main mistakes authors make when writing smiling characters is the belief that a flash of teeth and a wide grin is the only way to describe someone's smile. This can often come across as a bit cheesy and forced, and not at all believable.
Example #3
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I've been waiting for you all night and day,' she said. Froi shivered. He realised that the words came from Quintana the ice maiden. Realised, as he felt his face heating up, that the idea of this Quintana waiting for him with excitement spoke to parts of him he believed to be dormant. And then she winked. 'Did I do that right?' she asked. Her smile was lopsided and he saw a glimpse of the teeth. And Froi imagined that he would follow her to the ends of the earth.
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Unsure of how to write anything but your lips moving? Well then, head on over to the closest mirror and try a smile out for yourself. If your character is smiling from being complimented, pretend someone has just complimented you and smile straight into the mirror! Watch the way your face changes – do your eyebrows raise, do your dimples appear, do your lips become thinner or thicker, does your face crumple or smooth? You can easily notice a million different things about your face when you smile, so make a note of them and utilize them in your writing.
Try out all sorts of different smiles and notice the differences. And don't forget that when we smile, we often smile with our eyes just as much we do with our lips. Sometimes we can smile almost without our mouths moving at all, so keep this in mind and try writing this yourself.
Example #4
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Jem put the full force of himself into each smile, so that he seemed to be smiling with his eyes, his heart, his whole being.
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And what about the rest of your body? When you're gleefully smiling, is your body still and frozen? Of course not! Maybe your characters' hands would come up and try to hide their smile if they’re embarrassed, perhaps they’d brush some hair behind their ear, and maybe their legs would even go a little shaky. The more detail you can provide when your character is smiling that strays away from just their lips and teeth, the more realistic a scene you can write.