He said the pencil mustache — a thin line of hair just above the lip — is one of the more popular styles. Historically, mustaches have symbolized virility and toughness.

He said the pencil mustache — a thin line of hair just above the lip — is one of the more popular styles. Historically, mustaches have symbolized virility and toughness.

Why are so many young men sporting single mustaches? We explore this new trend and why it's happening.

"If you go to our website and just kind of peruse what we're writing about in our blog, you'll see more and more mustache articles because people are requesting it," Scalf said. He said the pencil ...