Chastity
From BME Encyclopedia
Chastity devices (such as chastity belts and chastity tubes) and chastity piercings are intended to limit or eliminate sexual fulfillment and access to genitals by both the wearer and anyone other than the person who holds the keys to unlocking the device. For men, this usually includes some device that makes erection impossible or painful. For women, it usually means some device that makes penetration impossible (or devices which make clitoral stimulation impossible, as with a clit shield).
