For daily wear I only spray once on the nape of my neck and when I go out I do each side of the neck. But it always depends on how intense the perfume is.
As for sun damage I can really say it does discolor your skin! I stopped spraying perfume on the sides of my neck in summer, because last year I got really large pigment spots on each side of the neck, where I used to place my perfume. I was horrified, but luckily it disappeared again after a few weeks. That´s when I started spraying perfume ONLY to the nape of my neck where my hair covers the skin.
As for sun damage I can really say it does discolor your skin! I stopped spraying perfume on the sides of my neck in summer, because last year I got really large pigment spots on each side of the neck, where I used to place my perfume. I was horrified, but luckily it disappeared again after a few weeks. That´s when I started spraying perfume ONLY to the nape of my neck where my hair covers the skin.