The Met Gala isn’t just an excuse for celebrities to walk the red carpet. The event is actually a fundraiser for the Metropolitan Museum of Art’s Costume Institute and has been happening since the ’70s. The Costume Institute is home to some of the world’s most precious and famous clothing from history and culture and is the location of every year’s gala. This year, celebs shared a bunch of bathroom selfies that showed guests smoking in the bathrooms at the Institute, and that’s got members of the Met fuming mad.

While fans loved seeing their favorite celebs hamming it up and having a smoke in the bathrooms at the gala, donors to the museum are expressing their outrage that this was even happening. An account in Harpers Bazaar has one board member storming out of the washroom when they saw what was happening, “It is so disrespectful to the museum,” the anonymous source was quoted as saying.

But why the commotion? According to the source, the collection at the Met needs to be free from pollutants in order for curators to maintain the fabric’s longevity. Some of the items in the Met collection are quite old and cigarette smoke could potentially damage the art on display.

With no word on what will happen (if anything) to the offending parties, we do see why donors to the Institute would be upset by the smoking in the washroom. Maybe next year organizers will set up a designated (outdoor) smoking area.

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(h/t Harpers Bazaar; photo via Dia Dipasul/Getty)