According to a recent New Mexico study in which beards were swabbed for cultures, it was determined that beards contain just as much fecal matter as a toilet. To be fair, some beards had normal amounts and strains of bacteria which were consistent with what a microbiologist would expect from swabbing facial hair, but a few had
enough enteric bacteria (bacteria found in excrement) to cause illness in humans.

Ewwwwwwwwww.

Do yourself and others a favor and make sure to wash your hands frequently, scrub your beard clean at least once a day, and avoid touching your beard.