This isnt a surprise for anyone; the mouth is the dirtiest part of the body. Studies have shown that there are over 600 different types of bacteria in the mouth. You can now understand why there is always bad breath if you dont brush your teeth regularly.
This shouldnt come as a surprise as well. Around 80,000 bacteria are residing in this body part, which is why chances of a stinking smell coming from your armpits are high. Dont forget to wash this area regularly.