Rubber Sack Shocks

Mistress Sidonia has her slave in a rubber sack with a double layer hood, she can now do as she chooses - first she teases him rubbing herself on his helpless body. Next she moves onto his cock ball which she attaches to some complicated electrics - to heighten the buzz she uses condoms filled with ice to cover the electrified cock balls, the water from the melting ice, increasing the conductivity. Finally she gives him an enforced hand-job showing that she controls everything now.