A solo boy, hungry for intense sensations, sets up his homemade CBT station. His cock, already hard and leaking, is the perfect target for his vacuum pump. He teases his sensitive frenulum with the pump's mouth, a shiver running down his spine. With a deep breath, he plunges the pump onto his cock, the sudden suction stealing his breath. He moans, his body tensing as his cock throbs and pulses in the intense pressure. Releasing the pump, he gasps for air, his cock purple and veins bulging, before eagerly repeating the agonizing, pleasurable process.