After erection, does the retraction of the foreskin to expose the glans count as phimosis?

Patient's question:

Age
Detailed medical condition and consultation purpose: When flaccid, the penis is completely covered by the foreskin, and after erection, the foreskin naturally retracts to expose the glans. Is my condition considered phimosis? Do I need surgery? I've read reports saying that phimosis can hinder penis development and lead to underdeveloped glans. Since I'm an adult, will my penis still develop? Will not having surgery affect future sexual life?

Doctor's answer:

Hello, the foreskin refers to the double-layered skin of the penis that folds over the glans penis. In infancy, the foreskin is usually longer, covering the glans and the external urethral orifice, which is known as physiological phimosis. As one grows older, the penis and foreskin gradually develop. During puberty, the foreskin retracts backward, exposing the glans by adulthood. If manual retraction is needed to fully expose the glans during an erection, it indicates that the foreskin is still somewhat long.