Example of a humbler being used. Pictured: Master Series Enforcer.
Common, a wearer is locked into the humbler by a dominant partner who also maintains control of the device’s key. This helps reinforce the couple's BDSM power dynamic.
While wearing a humbler, the wearer’s genitals are easily accessible to a partner who may choose to manually stimulate or spank them. Some humblers can be connected to electrosex units which allow "captors" to administer electric charges to the wearer's genitals. This is another way to reinforce the vulnerability and submission of someone strapped into the humbler.
Care must be taken when fastening the humbler to ensure it does not pinch the genitals, causing pain.