sentences:  Such a collar is generally not removed except for practical reasons such as medical or security requirements, unless or until the relationship is dissolved; however, a slave is sometimes permitted to wear a more subdued (or less obtrusive) one outside of the home — for example during work or in social situations with people who may otherwise feel uncomfortable.Slave training is a BDSM activity usually involving a consensual power exchange between two people taking on the roles of a Master or Mistress and a slave.The objective is to change the slave's behavior in a manner that is pleasing to the Master or Mistress, for example to train the slave to follow a set of rules or commands that the Master or Mistress has provided.