Sexually Transmitted Innumeracy

Drudge has the headline - 110 million Americans are infected with a STD.  I'm not sure what their angle is, that we are on the road to perdition - more STDs created than jobs - or that government is hilariously innumerate - 1 in 3 Americans are infected with a sexually transmitted disease.  Really?  One third of the country has a Sexually Transmitted Disease? 

Gee, and here I thought we were a bunch of puritanical ninnies.  That's a whole lotta bangin' goin' on to give the drip, the clam or the goo to 1 in 3.