He tries to apologize

"I'm sorry, please don't pop it." He pleads as he tries to pry your hand off.

"Apologizing won't change anything now. The damage is already done." You respond angrily, still maintaining your grip tight. "You fucked up, and now you are gonna feel my worst for it."

"Just because you had the audacity to even ask for forgiveness, i'm gonna make you suffer even more." You say and briefly let go of his testicles just to quickly wrap your whole hand around his right one, concentrating your entire grip strength on a single testicle. It's clear it's working as he immediately lets out a scream of pain, eliciting a smirk from you as you watch his suffering.