With real-world cameras, the standard head-shot is around 50mm. Most Hollywood starlets insist on being shot with a long lens (70mm-120mm) because it smooths out their features. Your 38mm shot may look more realistic, but realism and glamour are two different goals. Glamour is still in the eye of the beholder, of course... Anyway, shorter lenses tend to exaggerate the depth distance between nose tip and cheek level, and between chin and ears. Women generally prefer (I'm told) for their nose and chin not to stand out excessively, making them appear more masculine.