I hear guys who have sex with guys are higher risk, so less so if you're straight, but I could be wrong. And I'm not sure what the overall prevalence of those types of cancers are in men (though I believe the rates were rising a bit). It's also less effective if you've already had some partners and so exposure. And that's not cheap. Worth it? Um... I don't know.
River Song: Well, I was off to this gay gypsy bar mitzvah for the disabled when I thought 'Gosh, the Third Reich's a bit rubbish, I think i'll kill the Fuhrer'