Yes.
My balls are incredibly sensitive. While penis stimulation is of course a huge part of sex for me or oral or jerked/being jerked, add in any ball stimulation and my sexual senses go into overdrive. Whether that's from my huge balls smacking someone's ass as I pound into them, or them being sucked, or them being gently kneaded.
My bf and I were playing around once and he knows my balls are a huge erogenous zone for me, but he didn't know just how much. So I told him I was getting close to cumming from his jerking me, and he didn't want me to cum yet, so he thought he'd just fondle and knead my balls while my dick's intensity subsides a bit.
NOPE!
Hahaha, he's kneading my balls a good two or three minutes and my sensation is actually growing more intense, before I pop entirely, I honestly start ejaculating like a cannon, ropes just spewing thick and far out my big fat swollen member. He knows I am a huge cummer, but that load really surprised him with its volume and force, and it all just being from playing with my big balls. My hot white jets flew and hit the headboard of the bed, coated his whole forearm, the entirety of his hand, my own big cock, the bedsheet area near my dick, and it was still oozing in thick rivulets down my cock, dripping off my balls. It was fucking intense.
Now, he knows if he ever wants me to cum fast and super hard, he goes straight for my balls when I'm somewhat close to an orgasm, because I WILL deliver haha.