The image presents a close-up of a person's rear pocket area, with the focus on a hand slipping into the pocket. The hand is wearing what seems to be a coil of some sort, possibly a hair tie or elastic band around the wrist, which is creating a visual illusion. Because of the angle and the positioning of the hand, the elastic band gives the impression of being the top of a thong or underwear peeking out from the trousers.
The visual illusion is heightened by the similarity in color and texture between the elastic band on the person's wrist and what one might expect from certain undergarments. The casual attire, consisting of a black shirt tucked into light-colored trousers, emphasizes the informality of the moment. It is the unexpected displacement that catches the viewer off guard, thinking they have seen an intimate garment when, in fact, it is something entirely innocent.
Accompanying the image is a caption that suggests this is a unique and fleeting visual experience: "You will only see it once and never again..." This anticipates the viewer's double-take—the initial misinterpretation followed by the realization of what is truly being shown. It plays with the idea that the eye can be easily tricked, and such moments can be both comic and surprising.
The humor in the image comes from the momentary misdirection of expectations. The viewer is primed to see something risqué and realizes shortly afterward that they've been duped by their own quick assumptions. This kind of visual joke relies on the principle that humor often comes from the subversion of expectation—what we anticipate to see versus what is actually presented.
Another layer of the humor stems from the cultural taboos around underwear exposure. Society generally deems it inappropriate for certain garments to be visible publicly, so the initial thought that someone's underwear is showing in an unintended peek-a-boo fashion could evoke amusement or embarrassment. When the realization hits that it's merely a harmless elastic band, the relief can also contribute to the humor.
Finally, the smug knowledge implied by the caption that the viewer will only have this mistaken perception once adds to the mirth. After the joke is realized, the image loses its initial impact, becoming a clever visual play that can be appreciated for its artfulness. The emoji faces, with their surprised and knowing expressions, encapsulate the full arc of the viewer's emotional journey, from confusion to enlightenment, thus contributing to the amusement.
You will only see it once and never again