I was going to post snippets of all the information, but thought I would just provide some links instead. These are Canadian links but I am sure there are some good American links too, with similar information and likely the only difference being that there is an immunization approved for men in the States (the Canadians sometimes are behind the times relating to medicine). So here you go: (inform yourself or not, I hope you do though)
Play safe everyone! Have a great weekend!
P.S. I wish I could offer a nice hot story this Friday...hmmm...dang I need to get some!