Hello
Thanks for query.
It is a normal desire of a human being to get sexual satisfaction and
masturbation is the only safest way of getting it in absence of a female partner.However indulging it leads to addiction and problems related to erection and ejaculation what has happened to you.
I would answer your queried point to point
1)You do not have ejaculation but it early ejaculation due to excessive sexual stimulation by the firm grip of penis by hand.
Premature Ejaculation is a defined when one gets ejaculation within one minute of penetration o vagina while having intercourse with female partner .It is not applicable to masturbation.
2)It is due to habitual and frequent masturbation.
3)It is normal to loose erection verry fast if one masturbates frequently.
4)The size of your penis both in flaccid sate and on erection is normal and nothing o be worried about it.
5)Loss of stamina is psychological and due to masturbation .
6)It takes 65 hours to produce semen of normal consistency and thicknees so frequent masturbation over a period of short time will have watery semen.
At the outset you have to have positive frame of mind and please note that to masturbate is not a sin or crime .Everyone does it at the age of adolescence .
Please think positively and concentrate on your carrier .
Counselling by a
psychiatrist will help to resolve all your problems.
Though it is harmless, excessive and frequent habitual masturbation does affect quality of erection and ejaculation.Please try to reduce the frequency of masturbation by keeping yourself busy in activities like sports,reading ,social work etc so that you will not get free time to masturbate.
Dr.Patil.