for males puberty can occur bewteen 10 years and 14 years. A good sign puberty has arrived is if the boy can ejcaulate after masturbating. prior to this masturbation can produce pleasurable feelings but until sperm is ejaculated the ouberty process is incomplete. early and frequentmasturbation can hasten the efects onset of this normal condition.
The maturation of the human body is entirely determined by genetics and is not controllable in any way. Each person matures into -- and through -- puberty at a schedule that is theirs and theirs alone. Be excited when you begin noticing changes from your child's body into a teen's, as that signals the onset of puberty: The growth of hair where there was never any before, the bulking up of your bones and muscles (for girls, the layering of fat onto certain parts of their bodies or the growth of breasts and hips giving them that traditional "female" shape), and perhaps a general growth spurt.
Of course, most people equate puberty to the ability to begin functioning sexually -- girls begin to menstruate and have their monthly periods, boys begin to experience more frequent erections and perhaps some early (clear) versions of semen coming from their penis. In short, the body's systems are coming online and preparing for adulthood. Don't sweat it. Try to enjoy the journey, as scary as it might be, for it only happens once for everyone. If you can, marvel at the biological wonders your body is undergoing. You are becoming a butterfly!