Circumcised at 13? That must have been frightful. The usual reason given for why circumcision is OK, is that it's done during infancy when the baby is not fully self-aware.
The circumsize when born trend was being done by some people around the 70s and 80s, but beginning the 1990s, the trend is back to the more traditional circumsize at around 10 to 12 years old.
Basically the reason is the baby is too small, the doctor might chop off is penis; and the baby is fully self-aware and gets into horrific pain at such a young age.
At 10 to 12 years old, it is a right of passage that every Filipino boy is mentally conditioned to go through with. I had to remind my father to circumsize me, that is why I felt I was overage at 13 to be circumsized. We did laugh at a rather tall high school classmate when he was found out to be uncircumsized at a medical check up. He had his circumsicion at 16. Man, that is old.
Traditionally, before medical times, the boys in the province at around 10 to 12 years old on summer break would line up to be circumsized by the local healer who wielded a very sharp axe and "CHOP" one by one. The boys are asked to chew guava leaves while in line. Then CHOP. The boy spits his guava leaves on his just chopped penis foreskin as an antiseptic. Then jumps into the clean river just beside the line. Then he goes home for healing and wears their mothers' dusters.
My circumsicion was done in a hospital. My dad's and my grandfathers' circumsicions were done the traditional way.
It will be a painful 2 weeks. But it is a rite of passage every Filipino boy has to go through. After that, he feels he is going to grow up to be a REAL MAN and has the confidence to court women now that he is circumsized.
I never thought of a religious connection with circumsicion, it may be a Filipino tradition which has nothing to do with Christianity or Islam.
Here is a nice web page
http://www.circumstitions.com/Philippines.htmlLearn more about circumcision in the philippines when you search for the words: circumcision Philippines