Your hands. Think about EVERYTHING you touch every day. How many other people have touched the stuff you just touched?
i would say that the anus is the dirtiest...think of all the s**t that comes out of there...not to mention farts and all that good stuff.
where ever there is a Smeg build up actually if we are talking bacteria, i think i might be the back of the mouth and throat, it is covered (huge amounts) in usually harmless bacteria
i would say the mouth as well. especially considering it is a constantly moist environment, its just a harbor for bacteria.
Belly Button Cheese.... i get lint at worst which is always blue but cheese something wrong with you Nomar, the positive is you can lend some to Behad and HeyP when the do there BBQs