You can talk to your boyfriend about the harm of long foreskin. Too long foreskin can induce balanitis of foreskin due to chronic stimulation of urine and scales for a long time, which can cause edema, congestion, chyme, repeated cross infection and even incarceration of foreskin. If not treated in time, inflammation can spread along the reproductive tract, causing inflammation of prostate, seminal vesicle and epididymis, and can be transmitted to sexual partners through sexual intercourse. In addition, it can also cause premature ejaculation. Therefore, from the perspective of preventing infection and improving the quality of sexual life, it is recommended to operate as soon as possible. At present, Korean prepuce plastic surgery is ideal. The operation time is short, only minor, painless, and does not affect normal work and study.