They smell various fragrances & decide to have it or not. Technically this is not the correct way to select cologne. <br />The reason behind this point is that all kinds of perfumes are based on three major kinds of odors namely initial odor or top note, main odor or heart note and base note, aka, the <br />drydown. These are discussed in detail in later part of this article. If you want to get the right perfume you should consider these factors in mind for making the right purchasing decision.