The Ideas behind a Masters preference for his slaves to be bald are many ranging from cleanliness to a show of submission of the slave. the bald head is a symbol of service to a Master as is the slave collar, branding, tattoos and slave rings piercings, anklets and bracelets. These identifiers are displayed for all who are in the know to see that the slave is human property, chattel just as the leather flight jacket and boots were back post WWII identifiers for the gay leather-man of the old leather guard.
The act of shaving the head bald. A lot of people think this is just using clippers to buzz their hair really short, but this is not correct, they're not doing it right. A real headshave consists of buzzing hair really short and then using shaving cream and a razor to shave it clean. To the skin.
A beautiful head shave video