The human anus, or butt, is actually cleaner. The mouth excretes germs and bacteria of a more potent manner. But be aware of the fact that you are way more likely to get sick from having someone's anus in your mouth than having someone's spit in your mouth.
You have the most in your mouth and in your colon.
the way most germs spread is by breathing the germs out of your mouth, so somebody else breaths it in and the germs get in their body.
a million germs are in your mouth
150 million germs live in your mouth
A planarian has a mouth located in the middle of the underside of their bodies. They don't have anuses.
The anus for a jellyfish is its "mouth".
you can tell the difference between the mouth and anus because the mouth is darker then the anus and the mouth is a little bit larger than the anus
I don't think it is because the anus has tons of germs!! Plus it probably won't be pleasant...
well yeah most mouth wash but mainly germs and bacteria.
They have no anus and expel undigested matter through the mouth.
Millions and Billions FACT: There are more stars in the sky than bad germs in your mouth