This slave is in need of a punishment. He's been caught wanking. The first part of his punishment is that he has been locked into chastity.

A reminder his dick belongs to me.

But this is only part of the punishment.

He's told to close his eyes, so he can't see what is coming - but as he feels the sting of the nettles on his chest, he knows what is coming.

Of course, I don't stop there, they move down to his cock and balls. And with the chastity device, I can stuff the nettles inside the cage - for lasting, stinging, pain.

A harsh lesson he'll never forget.