Prevention of sexual activity by any means (Belt/Discipline)
The putting on of a chastity belt, by a partner, is an indication of the dominance by the "keyholder" over the wearer's sexual activities. By accepting the chastity belt the wearer accepts surrender of control over their sexual behavior to a partner, who may grant permission to the wearer to engage in sexual activity by removing the belt. The dominant may decide when, where, how, how often, and even if, the submissive is allowed sexual release.
These stories all contain chastity.