Real life is not comic books. There is no possible way that tiny orange blob in any way obscures who that guy is except to people who already don't know. XD
That said...meh. Weirder things happen in fast food to worry about some guy licking it. Besides, unless he had an exceptionally moist mouth, the salt and corn would've dried off all the spit after the first 6 inches of shells or so.
Go to the source of my knowledge as I'm a poor facsimile. http://sciencefriday.com/segment/04/12/ ... -guts.html" onclick="window.open(this.href);return false;
Saliva discussion begins at about 4:30. The discussion of antibacterial and healing properties begins at about 8:20. There's a lot of info there in general but it's about 30 minutes in total; digestion is a fascinating topic. One of these days I intend to read her book.