It's very exciting to see a hard penis, massive, with a bulging, dark, shiny penis, a dick that pulsates visibly, and to say that we will lock up. All the desperate envy that is inside, imprisoned without being able to break free before. Virility under the control of a woman. It's almost a castration (without the funny moment).
Remember to suck sex before caging so that the excitement is maximum. To make it débander, it's simple, just hit his testicles again and again until the penis enters the cage.