Why is the glans penis very sensitive to those secretions

Patient's question:

Year
Detailed medical condition and consultation purpose: My glans is very sensitive to those secretions. During sexual intercourse, if the woman's secretions are very abundant, I ejaculate within a few minutes. If the secretions are not much, it's okay~
There are many small rice grains on my glans, and I don't know when they appeared. It seems like they have been there for a long time~~ but they are more numerous now
~~Especially on the corona, there are two rows, the same color as the glans
Painless and no other discomfort.

Doctor's answer:

Hello, is a sign of a disease. In general, the factors causing are often related to phimosis or premature ejaculation. It is recommended that you go to a regular hospital for a check-up, identify the cause, and then receive symptomatic treatment.