The nerd's big balls swing heavily as he jerks off, his thick, veiny cock glistening with pre-cum. He alternates between pumping his shaft and cupping his large, hairy scrotum, lost in the ecstasy of his own touch. The room fills with his moans as he nears climax, his body tensing, and finally, he lets out a guttural groan as streams of hot cum shoot from his cock, coating his hand and dribbling down his shaft.