Synesthesia is a brain condition that allows for the simultaneous or joint perception of any of your 5 senses. For example, when certain people with synesthesia smell peony, they may see the color pink. Or when others smell whiskey, they may hear a dissonant sound.
The Pinrose Founders use this science of the interconnection of your sensory preferences to help you find your scent style. They have collected data on the interconnection of these sensory preferences in over 100,000 people. Using this data, they have created an algorithm that predicts scent preference. By looking at your color, shape, sound, and texture preferences, they are 3x as likely to help you find what scents are best for you than by asking you what ingredients you like in a fragrance.