Robert Downey Jr.‘sAvengers: Endgamemustache challenge isn’t for everyone. The Tony Stark actor posted a picture of himself, Chris Evans, and Mark Ruffalo with an assortment of bushy mustaches on social media and some Marvel Cinematic Universe fans aren’t into it for a few different reasons. The mustache is a controversial piece of facial hair and some men just can’t really pull the look off, even if they’re one of the biggest movie stars on the planet. Downey Jr. wants to know who out of the three of them has the best mustache.

One glaring omission is the fact thatRobert Downey Jr., Chris Evans, and Mark Ruffalo aren’t the only MCU stars, or stars ofAvengers: Endgame, to have ever rocked a mustache, which fans instantly pointed out. As it turns out, Benedict Cumberbatch has some pretty impressive upper lip hair and Paul Rudd’s handlebar mustache from theAnchor Manfranchise is pretty hard to beat. Chris Hemsworth has pulled the look off too and Sebastian Stan grew a pretty awesome mustache forI, Tonyaas Jeff Gillooly. The honorable mention has to go toThor: Ragnarokdirector Taika Waititi.

While some MCU fansaren’t into the mustachesat all, many pointed out that Chris Evans, Mark Ruffalo, and Robert Downey Jr. all lose to Marvel Comics legend Stan Lee. Lee had a mustache through most of his career and fans have called it his trademark. He often talked about his facial hair over the years and in 2014, he revealed that it was his wife who usually made the decisions on what he grew or shaved off. Towards the end of their lives, she preferred the smaller, well-groomed mustache, so that’s what Lee did.

Stan Lee obviously wins the mustache challenge without question. One clever fan decided to use his artistic abilities touse the Decimationto wipe the mustaches off of Robert Downey Jr., Chris Evans, and Mark Ruffalo, which is pretty hilarious. Another faction of fans really wanted to see Loki actor Tom Hiddleston with a mustache, so there’s some doctored images that have photoshopped facial hair on the actor in the lengthy Twitter thread. Downey Jr. opened up a big can of worms with his post today.

In another response to Robert Downey Jr.’s mustache post, a picture of Chris Evans from a magazine poll claims that 55% of people liked theAvengers: Endgamestar with a mustache. That is arguable and it really comes down to personal preference when all is said and done. With that being said, there were a lot of MCU fans who were pretty bummed to see that Steve Rogers ditched hisInfinity Warbeard and went back to the clean-shaven look. You can check outRobert Downey Jr.’s Twitterpost below, along with some of the best responses and a bonus video of Stan “The Man” Lee talking about facial hair.