Why do guys pull their nose hair when they drive?

So I'm stuck in some traffic on the highway and the guy in front of me has his side mirror aiming at him. And I could see his face. Then all of the sudden, the guy tries to rip out a nose hair. But I guess his grip was weak and he misses. So he tries again. And he scores. Then he takes his fingers and gently rubs his nose hair out the window. wtf!

This isn't the first time I have seen this. So I gotta ask. Why do so many guys like pulling their nose hair out when they're driving? It's freaking sick. Invest in a nose trimmer.