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")
Flaxian assassin Retaya traded with perfumes and had several samples in a case he owned, 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")