Actor and comedian Will Forte appeared on The Tonight Show With Jimmy Fallon last week and did something pretty funny, yet pretty gross at the same time.

Forte referenced an article from a few months back that described just how gross beards can be. Sporting a massive man-beard himself, Forte was a little worried about the gross substances that could be lurking in his facial hair. So he submitted to a test that would determine just what was living in his beard. The results were disgusting.

So what's in that beard? The same bacteria found in soil and dirty shoes, the bacteria normally found in dirty showers, and a whole bunch of other stuff you definitely don't want living on your face.