Coronal sulcus sensitivity is most commonly caused by masturbation and circumcision. The coronal groove, which is completely exposed when the penis is weak in normal people, is usually touched by the inside of the underwear or thighs and is not so sensitive. But the circumcised person, the coronal groove has been wrapped around the foreskin, the coronal groove has been very delicate, sensitive, afraid to touch. Be sure to cut off the foreskin as early as possible. Doctors recommend that boys be circumcised around the age of ten. Mainly during the development period, the coronal groove is not too sensitive, which leads to premature ejaculation. Masturbation is also due to frequent stimulation of the coronary sulcus, which leads to coronary sensitivity. Therefore, people with sensitive coronal grooves must get rid of the two causes mentioned above.