A tight collar sits around a guy’s neck as a sexy accessory or a clear BDSM signal, often paired with leather gear, harnesses, or other fetishwear. It frequently shows up in dominance scenes where a top grips it to control his partner, sometimes yanking him closer for kissing, oral, or rough fucking. The vibe ranges from fashionable and flirty to outright ownership, especially when it comes with a ring, chain, or leash.