Chopping the whole thing off would reduce the risk of HIV even further.
http://journals.plos.org/plosone/article?id=10.1371/journal....
Or one that considers multiple countries:
https://europepmc.org/abstract/med/7974070
Or a 2010 article about men in the United States:
http://journals.plos.org/plosone/article?id=10.1371/journal....
I’m literally finding this stuff by googling on my cell phone, so clearly you’ve not bothered to check yourself. Given the costs in dollars and lives I don’t understand the biases toward writing this off.