There is no uniform standard for how long a boy’s first time is, but generally more than 1~3 minutes is considered normal.
Premature ejaculation is categorized into primary premature ejaculation and secondary premature ejaculation. Primary premature ejaculation means that ejaculation tends to or always occurs within about 1 minute or less before or after insertion into the vagina from the first time the patient has intercourse. Secondary premature ejaculation is when the ejaculation latency time is significantly shorter, usually less than 3 minutes.
The first time a boy has sex, due to lack of sexual experience, and the mood will often be more nervous, anxiety, penis sensitivity is also higher, sex may be shorter, but as long as from the penis into the female vagina, more than 1 minute after ejaculation can be considered normal.
Generally with the increase in the number of boys sex life, glans sensitivity gradually reduced as well as increased sexual experience, sex life time will be gradually extended.
If a boy’s first sex time is too short, and in the future sex life is still not improved, it may be due to pathological reasons, need to go to the hospital in time, with the doctor to take examination and treatment.