They operate a huge machine that they have to push all day. A bit like in the villa but there are hundreds of naked and muscular slaves there.
Public slaves have the particularity of wearing an iron cage in place of a loincloth. So all of their repressed testosterone increases their strength and thus produces more.
Continuing their journey, the master takes advantage of showing the slaves unloading the boats, others working to construct buildings.
Throughout the course we see people walking their slave on a leash, carrying packages, others waiting to attach to a stake in front of a store and others used as dogs walking on a leash by their master.
Available for purchase at MsMsM Store.