The quirt she's using is quite savage as there appears to be metal attached to the ends which would intensify the pain. Then again, although the slave makes quite a lot of noise, he is able to take severe discipline and always comes back for more.
I Love having My Bare Ass Teased with a Lit Cigarette while I'm getting a Hand Job in the Diaper position. I shoot Ropes of Cum all over Myself in know time at all. Lol.
Ladies - balls can be fun for you to use for YOUR AMUSEMENT - and many of us guys would feel privileges to present ours to you for you to do as you please!