Article here. Excerpt:
'For circumcised penises, the most sensitive region was the circumcision scar on the underside of the penis, the researchers found. For uncircumcised penises, the areas most receptive to pressure were five regions normally removed during circumcision—all of which were more sensitive than the most sensitive part of the circumcised penis.
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Recent studies have also shown that circumcision can lower the risks of HIV infection by as much as 60 percent in sex between males and females.
But Robert Van Howe, a study team member at Michigan State University, thinks such claims are somewhat overblown. “The [health benefits] that have been consistently shown are very small, and there are less aggressive, less invasive, less expensive ways of dealing with the problems [circumcision] is supposed to address,” Van Howe told LiveScience.
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Some previous studies found that circumcision led to little, if any, decrease in penile sensitivity, but Sorrells and his colleagues say such findings are suspect because many are based on self-reports from men who were circumcised to correct medical problems.'