A perfume or cologne is a fragrant liquid used to give people or things a pleasant smell.
Males from Angel I used perfume in spray flacons quite frequently. When Data saw the perfume, he called it "an alcohol-based synthetic, artificially reproducing a floral scent." When asking about the purpose of a perfume, Counselor Troi added that some cultures consider perfume an aphrodisiac. (TNG: "Angel One")
The Flaxian assassin Retaya traded with perfumes and had several samples in his case, including perfumes that smelled floral, musky and spicy. By mixing some of the fragrances, he was able to produce a strong poison that would cause a heart attack in those who inhaled the scent. (DS9: "Improbable Cause")