Nobody in "Perfume" is described by face, voice or name. All we learn about the person who walks by is what they leave behind in the air. That is the poem's quiet trick. It looks like a poem about a scent, but it is really about the effect one person has on the speaker, and the smell stands in for everything the speaker never says outright.
The first simile sets the tone: "It's like candy." What follows is a run of taste-and-touch words, "sugary and sweet, / Smooth and overpowering", applied to something you smell. Mixing the senses makes the perfume feel almost edible, something tempting. But "overpowering" is a small warning tucked inside the compliment: sweet, yes, but maybe too much. The speaker then shrugs off any complaint with a flat, colloquial "But it works." It sounds like someone conceding a point in an argument they would rather have won.
What exactly it works at is spelled out in the hesitant, stretched-out lines: "It adds to you, / Making you, / More noticeable." The commas make the sentence stumble forward, and "More noticeable" sits alone on its line, so it gets noticed, just as the sentence claims. The next line is the most revealing: "And making it harder to focus." The poem doesn't say whose focus is lost, but judging by what follows, it is probably the speaker's. The perfume is a distraction, and the person wearing it is the real one.
Then comes the second comparison, and the speaker finally appears: "It's like a drug, / I can never get enough of the smell." The poem moves from candy, a harmless treat, to a drug, a craving, and the "I" arrives with the confession. The next lines, "I know when you walk by, / Because the air grows sweet", show how far this has gone. The speaker doesn't need to look up. "Sweet" echoes the opening, so the air has literally become the candy of line one.
The third simile, "It's like a switch", is the most visual. Candy, drug and switch all begin with "It's like," and the repetition makes the poem feel like a speaker trying out comparisons, hunting for the one that fits. The switch is the best of them because it turns smell into sight: "a dull gray day" flips into something colorful the moment "you walk by." The line reads "very thing becomes colorful," which looks like a slip for "everything," but the missing letter hardly hurts the effect. The most grown-up moment comes right after: "For a time at least." The color is temporary. Once the person has passed, the gray presumably returns, and that small qualification adds a note of longing under the cheerful surface.
The form supports all of this. There is no rhyme and no regular meter. The lines are short and plain, closer to talking than to performing, which makes the poem sound like a confession rather than a display. Where the poem does have music, it is in its soft s-sounds: "sugary," "sweet," "smooth," "scent." They hiss faintly, like a spritz of perfume. The poem also holds back its key word. "Perfume" appears in the title, but inside the poem it waits until the last line: "It's a wonderful scent, / Your perfume." After the drug and the switch, the ending is deliberately small. The speaker settles on the plainest adjective available, "wonderful", and on the word "Your," the only possessive in the poem, which finally ties the scent to a person.
The poem makes no grand claims. Its value lies in how honestly it catches a familiar experience: a single sensory detail carrying a whole feeling, and an ordinary gray day briefly changing color. The speaker never says "I like you," yet every image points that way, so the poem reads as affection, or perhaps a crush, through inference alone. Its restraint is its strength. By describing only the perfume, it lets us feel how much more the speaker is noticing.