Trent of Angel I using perfume
A perfume or cologne is a fragrant liquid used to give people or things a pleasant smell.
Aboard the USS Enterprise in 2266, Charles Evans gave a gift of perfume to Yeoman Janice Rand. This kind of perfume was colored green and was Rand's favorite type of perfume. It wasn't available from ship's stores, so she asked Evans where he got it, though he gave her no answer and she hurriedly left to attend to her duties. (TOS: "Charlie X")
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")
Kevin Uxbridge's recreation of his wife Rishon was so convincing that Captain Jean-Luc Picard could even smell her perfume. (TNG: "The Survivors")
Lieutenant junior grade Aquiel Uhnari had a bottle of perfume on her nightstand. (TNG: "Aquiel")
In 2369, Julian Bashir asked Jadzia Dax about the name of an exotic scent she was wearing. (DS9: "A Man Alone")
Jadzia Dax gave Lenara Kahn a bottle of Risian perfume as a get well present after an accident on the USS Defiant when attempting to send a probe through an artificial wormhole. (DS9: "Rejoined")
Keiko O'Brien once gave Miles O'Brien a silk handkerchief with her perfume scented on it. (DS9: "Rivals")
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")