As someone living in the near-center Copenhagen, i can say that wearing helmet is gay
Only pencil-pushing office dwellers, family-fathers and "pro" legginswearing-cyclists use a helmet here. Deep in their heart, everyone feels that wearing a helmet makes them a house-cat, and they are no longer born-to-be-wild men. Every time you lock them chin-straps, you become a responsible member of society, and your soul dies a little...
Check out the OP video, and see how many helmets you can count, and who wears them.