Entertainment Movies Watch Jimmy Fallon Help Josh Brolin Shave Off His '1970s Porn' Stache "The next movie I'm doing is a 1970s porn," Josh Brolin joked By Jodi Guglielmi Jodi Guglielmi Instagram Twitter Writer-Reporter, PEOPLE People Editorial Guidelines Published on January 27, 2016 09:30 AM Share Tweet Pin Email Photo: NBC/Wenn We mustache you a question, Josh Brolin – what’s with the new look? Brolin, 47, had a lot of explaining to do when he stopped by The Tonight Show on Tuesday sporting some new facial hair. “The next movie I’m doing is a 1970s porn,” the actor joked about why he was rocking a thick mustache. “I’m doing research.” “Somebody just went ‘Ew,’ ” he laughed at the crowd’s response. Brolin explained that he just finished working on his latest film Legacy of a Whitetail Deer Hunter, for which he spent three-and-a-half months filming in the woods. For the role, he had to gain 40 lbs. – which he proved by unbuttoning his shirt a little – and grow out his facial hair. But before Brolin could finish talking, host Jimmy Fallon reached under his desk and pulled out an electric razor. “Come on dude, come on, just let me,” begged Fallon, 41, as he turned on the razor. When Brolin looked a little hesitant, the host compromised, saying, “We’ll do one half.” Finally, the actor agreed – and yes, half a mustache is much worse than a full one. Loving the half-stache, Fallon pointed out some perks that come with the rather interesting look. “This is great, now you can play two characters at once,” he said, explaining that all Brolin had to do was turn his head back and forth. “The ’70s porn,” said Brolin, facing the side of his head with the mustache to the audience, before turning his head to the freshly shaven side. “And oh my God I love, The Goonies!” Fallon then attempted to finish shaving off the other half of the mustache, but after more hairs kept falling into Brolin’s mouth, the two eventually went back to the old-fashioned way of shaving – with shaving cream and all. “This is so awesome right now,” gushed Fallon. “This is like a fantasy cab or something, it’s like, ‘You get to shave with Josh Brolin.’ ” Watch the video to see what they two chatted about during their barbershop moment. Hint: It has to do with Donald Trump.