If circumcision provided 100% protection against HIV, as one example, then no, of course I would not oppose it. But it does not. There is a lot of conflicting evidence on just how much protection, if any, it does provide. The medical authorities are saying it "might" provide some protection against HIV transmission. There is a lot of current research that has been provided in this thread which shows that the protection it does give is not a guarantee. Would I circumcise my son's based on the current research? No. As it stands, they are simply too young to be sexually active and I am not prepared to take away a part of their bodies based on the figures I am currently seeing. When they are old enough to decide for themselves and state they wish to be circumcised, I'll pay for it myself. It should be their decision to make, not mine or my husband's.