It is both a punishment and reward for a slave. Slave should always expect a slap from the master.
GAY TWINK SWALLOW TUMBLR FULL
The master notices it, and grabs a fist full of slave’s hair in his hand. As an obedient slave it is slave boy’s duty that from time to time he starts wiggling his bum and shaking his head. While master does it, slave boy keeps begging for more. It is natural for a dog slave to offer his hair to master and ask him to drag around by grabbing slave’s hair.