Boys and girls , god put us on this earth to have a laugh , hence the term " laugh lines . 男孩们女孩们,上帝让我们降临到这个地球是为了让我们笑,所以有这个词"笑纹
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For example , someone who smiles a lot may develop lines and muscles that are suggestive of someone who is happy . other studies have shown that partners who are genetically similar to each other tend to have happier marriages 举例来说，喜欢笑的人脸部可能会出现“笑纹” ，相应的肌肉也较发达，而这些也同时暗示着这个人很快乐。
