Face Sitting Ruined Orgasm

Decked out in my brand new mesh catsuit and with my slave tied in four point restraint to the bed, i'm in a mood to cause some slave suffering, but in this case i'm going to mix his pain and pleasure. i start giving him a hand job while alternating ball slaps to get him nice and excited, this is going to be so much fun!! i spit into his mouth, make him lick my armpits, and slap his face as i continue his hand job. of course i can't help but deliver some hard knees to his nuts as i'm stroking his cock. i'm all about giving painful hand jobs to my special slaves, but there will be no pleasure without pain. i take a small but lethal rubber flogger and begin whipping his cock and balls. i can tell he's getting close to orgasm but what he doesn't know is as soon as he starts to cum, i plan on playing wack-a-mole with his nads, which ruins his orgasm completely!!