Kings of Leon -- Yes, It's About STDs

8/27/2009 2:09 PM PDT BY TMZ STAFF
The song "Sex on Fire" just got a little less sexy -- because the band finally confirmed to us it's actually about STDs.

Kings of Leon: Click to watch
OK, so they may have been joking, but still ... makes you think twice about those "hot as a fever, rattling bones" lyrics, right?