Well, it's because November 2013 is the month of men's health.
''Goodie!'' you say, ''but what's up with all the guys growing a mustache?''
It's because November 2013 is a men's health awareness month, prostate and testicular cancer in particular, as well as being a men's mental health education and prevention month.
''Yeah, but what's up with the mustache?'' you ask.
Well, don't they look extra manly with a mustache? It's kind of a symbol of their masculinity.
''Yeah, they do look kind of sexy...'' you say: ''so what can I do to show support?''
You can check out the Movember webpage:)
I dedicate this post to you men, because no matter how much you push our buttons, at the end of the day, we still love you!
Images taken from the following webpages: