F : we kind of do the same thing. I decide on some kind of program in my head, and if he lets me go through with it, we do what he wants. But he's not attached, it's up to him if I give him the next kick.
C : But what I prefer is when we're done. I untie it, I look at him smiling, naked, lying on the bed, legs a little apart and ass a little lifted, you see, and I tell him "so, what are you waiting for ? Fuck me or I get dressed ?" And he's trying to get a hard-on but I've busted his balls so hard that the pain outweighs the excitement. But hey, usually I suck him or he manages to get excited on his own. But once I got really dressed and when he was finally in a fit state to fuck me I told him that first we would do another ballbusting session. Haha he finally agreed. The session was short but he couldn't do anything, when I untied him he remained curled up on the bed. Pretty pathetic, and I was so excited it frustrated me, so I never did it again. But at the time it was fun !
F : I can imagine ! Like when I use the crusher on his balls. I suck him, crushing the balls again and again and when he's finally about to cum I tell him it'll cost him a few extra turns of the screw.
C : You use a ballcrusher ?
F : Yes, I used it for the first time into the BDSM club. Love it ! I almost crushed his testicles for real the first time.