Ace the Spray Test
Next, perfect the spray test. Let's get this out of the way: Do not, now or ever, spray the cologne into the air and walk through it. That is a waste of a scent, since most of the scent droplets will hit the floor before they touch your person, and even if they come in contact with you, they will land on your clothes, not your skin.
Also, despite what the salesperson tells you, do not spray the cologne on one of those little white papers and wave it around in front of your face. It's the skin test that matters most. "Finding the right signature fragrance is about the chemistry between your skin and the notes composing your fragrance," says Boulet. "Each one of us has a different skin, with a distinct acidity level which shapes our natural body scent. That's why a certain fragrance may smell quite different from one person to another."
Holding the cologne about 6 to 8 inches from your body, spray the inside of your wrist or elbow crease. You want to hit areas where blood vessels are closest to the skin surface and bring heat to the area, which helps the scent be diffused into the air. After you spray, rather than sniff and judge on the spot, take a 15-minute walk around the floor to give your skin and fragrance time to interact. The smell will be truer to what you can expect over the course of a day.