I'm not exactly what you would call "anal" about cleanliness, but I do take normal precautions.
I wash my vegetables and fruits before consumption, and I even wipe off the top of the soda/beer can prior to drinking.
Why is it, then, we all feel so comfortable putting a cigar in our mouth ? These are, afterall, made almost exclusively in third world countries where the "Board of Health" is nothing more than the shelf that the asprins are kept.