Slaves may not speak without permission
Slaves, of course, save in critical situations, as in emergencies, may not speak without permission. To be sure, most slaves have a standing permission to speak, particularly when alone with their masters, but it is always clear to them that this standing permission is a permission, and that it may be revoked at the master’s pleasure.
Slaves, of course, as other women, love to speak, and suffer when not permitted to do so. They are denied one of the loveliest and most precious of their pleasures, and gifts. It is a torment to a slave to not be permitted to speak. Most masters love to hear their slave speak, are interested in her slightest thoughts, and often attend to her views. But, when all is said and done, she may be simply bound and thrown to the furs.
Smugglers of Gor, p. 113