Scent layering is the practice of combining two or more fragrance products to create a more personal scent. Instead of treating perfume as one fixed bottle, you build a small fragrance wardrobe and adjust it by mood, season and occasion.
Simple rule
Choose one fragrance as the main character and one as the supporting layer. If both scents are loud, reduce sprays. If both are soft, use a stronger base note such as amber, woods or musk.