You're drinking too much water
Hormones !
Do not worry, such thing never happens. Everyone goes through puberty. Some might start at a later age.
Puberty happens at its own pace. Everyone goes through puberty at their own pace. Some go through it fast. Some slow.
The main thing that happens is that the body becomes sexually mature. After puberty, the body is capable of reproduction.
If u sperm while puberty don't worry it's normal.
The womb holds the eggs when girls are going through puberty
As long as they have gone through puberty
yes, this happens both when men and women go through puberty
In males, puberty starts by the ages of 13. Some start before, some start after. First, the brain signals the glands to produce hormones to increase the testis size and make the male sexually mature.
Nothing causes it it happens on its own
yes, it is called bloating and happens to every girl during puberty
Yes before puberty you can produce semen. But this semen may not contain any fertile mature sperm.