it takes about 2 to 3 days for the testicles to fully replenish sperm. after that, it stops producing it. you should try to ejaculate when your sperm count reaches its peak though, as the lingering sperm becomes older, and is more prone to disease. keep your testicles producing new, healthy sperm to avoid this. finally, a good reason to beat that meat eh?
"Pre - ejaculate" can be present from immediately with an erection to moments before orgasm. It is the clear, sticky lubricating fluid that has nothing to do with orgasm.
It depends on the particular man. His age and the amount of sexual stimulation will also have a bearing.
Until after he either ejaculates or loses interest.
The average man should/will last about 20 seconds
...I last two hours because mine is 40cm
Because you probably ejaculate frequently not allowing much time between ejaculating to produce more sperm. Your sperm isn't infinite, it needs time to produce. Or, on the negative side you have a low sperm count and you should see a doctor.
Penis size has nothing to do with how much sperm or ejaculate you produce. That comes from the testicles. Average is about 1 teaspoon, but just like penis size, this varies a lot and will vary some each time you climax.
Of course they do. Sperm is produced whole life time
You can't really do anything to produce fast sperm. It all depends on your wife's ovulation schedule as to when she might get pregnant. You can try at home ovulation kits, they might help you get an idea as to when the best time for your wife to get pregnant is. As far as if you are trying for a girl or boy keep in mind the "slow" sperm you produce is stronger and equals girl where as the "fast" sperm is weaker and will produce a boy.
not always, if he has a successful vasectomy then it can't be released
None. The sperm is not stored in the penis, so none is there except during and immediately after ejaculation (and sometimes right before if you produce preejaculate). The testes are what produce the sperm. However, it is your seminal vesicles which store the sperm cells and the other secretions your body makes which are collectively called semen. During ejaculation, you may release about a teaspoon's worth, give or take some.
If you are 15 years old, and you have never ejaculated, then you have started puberty late. But try masturbating for a long period of time and if sperm still does not come out then you have not yet developed sperms, and nothing can be done about it. You will start to produce sperm in your semen as you grow older. At first when masturbating you will have dry climax's, then you will progress to have some fluid which will be semen, this is usually whitish and sticky, it may be almost clear. Later as you mature you will produce sperm in the semen. It all happens during puberty. If you are 15 now you should be well away in a years time.
sperm needs to mature enough to reach the egg to form zygote
It depends on the person, but on average men will ejaculate about 1,080 gallons of sperm in their life time.
Provided that you are not suffering from malnutrition, the amount, when or what you eat has nothing to do with your sperm.
how much energy is lost to fall one time sperm
pseudotolerance