I just websearched, this sort of problem is more common than I thought!
http://news.bbc.co.uk/1/hi/world/africa/1274235.stm
"...While the sect members were on a house-to-house preaching mission, someone raised an alarm that his penis had disappeared..."
Could it have been... James?
I think the good news, is that since most men check it's still there at least every six minutes, the chances of an epidemic of missing penises (penii?) are thankfully slim.