No. Boys develop at different rates, and puberty takes years to complete.
No one can tell when someone will go into puberty.
No. It is not normal to barf, due to puberty. Maybe you have another problem you should get checked out.
Yes, everyone goes through puberty . Some go through it at an early age some at later age. Some have accelerated puberty some have a more slow one.
... hopefully a lot less stupid mistakes than they made while going through puberty...
Yes before puberty you can produce semen. But this semen may not contain any fertile mature sperm.
Whenever you are sexually attracted to someone but if your going through puberty it can randomly happen.
It is usually pretty clear. That would be normal.
On average, blind girls go through puberty at the same ages and rates as any other girls.
depends. have you went through puberty
Reasons for not going through puberty (for a boy) would include damage to the testes as the result of an illness or an accident or the removal of the testes (castration).
Everyone goes through puberty, unless your hormones are whack.
Trust me they've known for quite some time. There's a certain attitude change in the mood when someone enters puberty. And they have been through it themselves so they know. If you want you can simply just say "I think I'm in puberty".