This is a wide-ranging subject, not limited to humans. Of course, your personal coiffure -- past or present -- whether as a selfie or snapped by a spouse, is fine. If you got it, flaunt it! But anything or everything that even faintly resembles hair is fair game! (Are there hairy fish?) Pets of all kinds, wild critters, bugs and birds, babies and crazy teeners, Halloweeners in costume -- you name it. Go to it.
When hair seemed important. Yellowknife circa 1970.