How old is it to be normal for a boy to ejaculate?

Spermatorrhea is normal in boys aged 12-16.

Spermatorrhea refers to involuntary ejaculation in the absence of sexual life. Under normal circumstances, men will appear after puberty. The age of sexual maturity varies from person to person, basically between 12-16 years old. The number of spermatorrhea per month is generally no more than 3 times, while the occurrence of spermatorrhea before puberty is abnormal and requires timely medical examination.

If the number of spermatorrhea is too frequent, it indicates pathological spermatorrhea and requires timely intervention.