For two reason... so he could see his own reflection and gauge the effect of the paint he had applied to his face and also as an expression of power, by having someone else fetch the coconut for him rather than just getting it for himself.
He filled the empty coconut half with water and used it as a mirror to see how he looked with his newly painted face.
Samneric
Samneric ratted Ralph out because Ralph was torturing them.
In piggys asswhole
In "Lord of the Flies," Ralph's secret hiding place is revealed to Jack and his tribe by Samneric, Ralph's two loyal friends who are captured and tortured by Jack's tribe. Under pressure and fear, Samneric betray Ralph's hiding place to Jack in order to avoid further harm.
Samneric are captured by members of Jack's tribe when Jack gives the order to "Grab Them!" None of the capturing boys are named.
The signal fire went out when Jack made Samneric leave the fire duty to go hunting. It also goes out when Samneric "see the beast".
samneric
During the confrontation in "Lord of the Flies," Samneric betray Ralph's trust and align themselves with Jack's tribe. They give away Ralph's hiding place to the other boys, leading to Ralph being hunted like prey. Ultimately, Samneric are forced to participate in the hunt for Ralph against their will.
samneric
Samneric
The main characters of Lord of the Flies are Ralph, Simon, Jack, The Hunters, Piggy, and Samneric. The other characters are The littleluns, Maurice, Robert, Percival Wemys Madison, Johnny, and Henry.