That word makes me chuckle.
Yeah I saw that, but I find that difficult to comprehend. The amount of excretory build up of common fluids it must take to cause cancer must be astronomical. I'm not talking merely third-world hygiene, but a complete absence of it for like....decades.
I'm not a doctor, but to imagine that all of our ancestors were running around with dick cancer just because there were no Jews running around snipping them is hilarious. Likewise I can't imagine them not cleaning themselves ever. Even regular sexual activity would have been sufficient to remove the chunky debris they must be referring to. (Pardon me while I wipe the vomit off my thigh.)
My feelings are that these researchers (and we have no idea where they're from, what their qualifications are, or what their agendas might be) stumbled upon a completely vague and remote statistic and ran with it. Stats are always completely ambiguous.