Ejaculation occurring very quickly after penetration is commonly due to Premature Ejaculation, which can be caused by factors such as anxiety, stress, lack of sexual confidence, oversensitivity, or sometimes medical conditions like hormonal imbalance or prostate issues. The condition is treatable, and improvement usually comes with a combination of approaches: behavioural techniques like the stop-start method and pelvic floor exercises can help increase control, while counselling can reduce performance anxiety. Doctors may also prescribe medications such as Dapoxetine to delay ejaculation, and if there is associated erection difficulty, medicines like Sildenafil may be added. In addition, maintaining a healthy lifestyle with regular exercise, good sleep, and avoiding alcohol or smoking can improve overall sexual performance. It is important to consult a doctor for proper evaluation and guidance, as most men respond well to treatment with consistent effort.