What are handcuffs used for on Valentine's Day?

On Valentine's Day, handcuffs can be used as a playful and seductive accessory in romantic settings. They symbolize a sense of adventure and can add a fun, flirtatious element to couples' activities, such as role-playing or creating a themed experience. However, they should always be used consensually and in a safe manner, ensuring both partners are comfortable with the playful context.