Q: I am 14 years old. Is it necessary for me to shave my pubic region (front private part) hairs?
A: Once hair grews in the pubic area (around the front and back private parts) then it becomes necessary to shave. It is not permissible to leave the hair for 40 days without shaving. So yes. regardless of your age, when hair appears, it must be shaven. Also note that you need to shave hair around the anus as well (that is, the back private part).
Ref: Raddul-Muhtaar, Alhazr wal Ibaahah