Last night, my partner of 5 years and I were chilling on the couch. We'd been smoking weed and chilling most of the night, and had already had sex once - a must after I'd been away on a work trip for days beforehand. We'd been snuggly and affectionate for most of the day. They can get a little bratty and love to tap, smack, and squeeze my balls all the time - which almost always turns me on.

I started my in-person sexual journey into ballbusting almost 15 years ago with women, but I've been titillated by getting racked in the balls by friends of any gender. I've been with my partner for over 5 years through their transition - they had identified as female as I'd known them but it had been a massive joy to witness the early stages of their transformation as they came out as non-binary, choosing a new name and adopting they/them pronouns. And I found myself as turned on by them busting my balls as ever.

Anyway, back on the couch, I noticed my partner working over their shoulders with a bonger, one of those massage tools that's got a sort of flexibly pliant handle with a heavy rubber ball at the end. I'd been tapped by those once or twice but it had probably been over a decade.

"Would you like to bop me in the nuts with that, darling?" I asked, mischievously.

Their eyes widened. They'd felt how hard they'd been pounding their muscles with the bonger - surely I didn't want them to punish my balls with it? The surprise quickly turned into a spark behind their baby-blue eyes. I craved that spark - it meant they were going to push me harder than most men could ever hope to take.

Their hands slid up my thighs before lovingly, gently, outlining the print of my cock and balls. They admired the view, before lining up their aim. With a determined stare, they swung the bonger sharply into my balls. THUD. 90% of the force hit my right testicle, pummeling it into my thigh. I curled into a ball and howled in pain, which shortly gave way to a disbelieving chuckle. FUCK that hurt, and I knew how tempered their strike had been. They could have truly destroyed one or both of my balls if they'd really wanted to with that thing, but I trusted them completely. They know how to deliver agony without ever compromising safety, and I really admire that about them.

As I slowly returned to a normal sitting position, I explained to them where the shot had landed. "I guess I've got to balance you out then" they said, grinning. I hemmed and hawed for a moment before sliding my legs apart again, inviting them to deliver an equal blow to my left nut. THUD. The strike hit exactly where they'd meant to place it, and I was back in the fetal position.

They wanted more, so I slid my pants off, allowing my quickly thickening cock to spring free. They popped off the couch and returned with a bottle of lube. They applied it generously to my growing dick, as they rained blow after blow onto my balls from all angles with that heavy toy. None of the hits matched the ferocity of the first two, but the first two had done such damage that every tap felt like a hammer strike. I quickly fell into a nonverbal state, moaning and groaning in no language at all.

Then came the question: "Do you think I could pound the cum out of you?"

I nodded eagerly, begging them to find out.

The hits came constantly from every angle, like a masterful blacksmith pounding my balls into (and out of) shape. I felt it building in me and then BANG. The hit that knocked it all out of me in one shot. My eyes were clamped shut but I heard their reaction - something in the way I came had stunned them, and they stopped hitting me.

"NO" I screamed internally, desperate for them to rain a hundred more blows down on my balls pounding every drop of cum out of me, pressing every drop of juice from my throbbing plums. (Later, when I asked why, they said that while I normally shoot several pulses of cum, this time I had blown the whole load in one "shotgun blast" - they were so stunned they just stopped to watch their handiwork!).

They stroked my cock admiringly as I came back into the real world, and took photos of me, documenting how swollen my balls got (it truly looked like they were holding two fleshy red lemons). Next time I hope they hit me harder and even more. I'd deal with swollen bruised testicles around for weeks for my partner if that was what they desired.