help

well i just received a call from the school again. this time it is number 2 son. someone dared him to steal something off a teachers desk(some candy) so he did........ i guess brain surgon is out of the question for him...now for the last three days of school he has in-school-supension. someone please help me..... good thing i am going away for a few days with a girlfriend. my son better hope i am all rested and relaxed by the time i get home. i just don't know where i went wrong. we have tried to be good parents and teach our children right from wrong. WHY do they do stupid things????????????