Reddit user posts photo of mysterious jeans loop, sparking debate; actual purpose is for attaching button or keychain.

Mysterious loop at back of jeans sparks online debate, but there's a simple explanation. An anonymous Reddit user posted a photo of their jeans, zoomed in on a small hoop beneath a pocket next to the leg seam, and asked, "What is the purpose of this in a pair of jeans?". Many users replied with humor, and some speculated it was for "swag" or to catch on edges. The actual purpose of the loop is to attach a button or keychain, offering extra security for belongings.