Circumventing HIV: Researchers are saying that circumcision cuts the risk of AIDS:

Men who have been circumcised may be six times less likely to contract the HIV virus than uncircumcised men, research carried out in India suggests.

The study in the Lancet journal says that the thin foreskin tissue could be highly prone to HIV infection.

However, the study isn't a very definitive one. There were only 191 circumcised men compared to 2107 uncircumcised ones. The rate of HIV infection in the uncircumcised was 0.07%. The rate in the circumcised was 0.01%. There's a difference to be sure, but a very, very small one. Don't expect circumcision to be the definitive defense against HIV infection.