Mark Zuckerberg
Mark Zuckerberg, founder and CEO of Facebook, reacts during an address to a gathering at the Internet.org Summit in New Delhi October 9, 2014. Facebook Inc, which closed its acquisition of mobile messaging service WhatsApp on Monday, has no near-term plan to make money from the service, Zuckerberg said on Thursday. REUTERS/Adnan Abidi

Facebook founder Mark Zuckerberg has answered the most pressing question in his first ever public Q&A: Why does he wear grey shirt everyday?

Apart from occasions that require him to wear a more formal attire, the 30-year-old billionaire is almost always seen wearing a nondescript grey, round neck t-shirt and dark jeans. He also wears another piece of clothing that many consider his signature look, a black hoodie.

On Thursday, Zuckerberg and the top executives of Facebook were at their California headquarters to answer questions from the public. Some have submitted their questions on the Web site, while others also flew in to personally ask him their questions.

One query that elicited laughs from the room was a sartorial type from a user named Antonio from Italy who submitted the question online. “Mark, why do you wear the same shirt everyday?” followed up with the questions, “Is it the same shirt? Is there one? How does this all go down?”

“You would be happy to know that there are multiple[s] of the same shirt,” Zuckerberg smiled as he explained his fashion choice. “I really want to clear my life to make it so that I have to make as few decisions as possible about anything except how to best serve this community. There’s actually a bunch of psychology theory that even making small decisions around what you wear or what you eat for breakfast or things like that, they kind of make you tired and consume your energy.”

He continued, “My view is I’m in this really lucky position where I get to wake up everyday and help serve more than a billion people. I feel like I’m not doing my job if I spend any of my energy on things that are silly and frivolous about my life.”

Facebook COO Sheryl Sandberg also reassured the audience that he owns more than one of the same shirt.

Zuckerberg was the subject of the 2010 drama “The Social Network,” in which Jesse Eisenberg played him. He has previously stated in interviews that the film was fictitious and concocted a lot of untrue events. When an audience member asked him about his thoughts on the movie, he reiterated that the film was fiction.

“I think the reality is that writing code and building a product and then building a company actually is not a glamorous enough thing to make a movie about. So you can imagine a lot of the stuff they probably had to embellish and make up. Because if they were really making a movie, it would have been of me sitting in a computer coding for two hours straight,” Zuckerberg explained after saying that he hasn’t thought about the movie for a while now because he had “blocked” it from his mind.

“To this day, I haven’t met the writer or a lot of the folks who made the movie. I met the guy who played me in the movie one time when I was on ‘Saturday Night Live,’” he continued, referring to the time he made a guest appearance in the comedy show to surprise Eisenberg, who was hosting the show. It was the first time that the two had met.

Zuckerberg added that although the film took pains in making sure some details of the film remain true, such as the interior design of their offices, they “made up a bunch of stuff that I found kind of hurtful.”

He continued, “I take our mission really seriously. We’re here not primarily to build a company, but to help connect the world and help people stay connected to the people that they love and they care about and help them get information about the world. We take that very seriously. So the thing that I found the most interesting about the movie was that they kind of made up this whole plotline about how I somehow decided to create Facebook to attract girls.”

He is married to his fellow Harvard student Priscilla Chan, whom he has been dating for more than 10 years, even before he started developing Facebook. As he explained, he if created the popular Web site to be popular among girls, that wouldn’t have gone over too well in his relationship.