Life in plastic is once again fantastic, according to "Barbie" director Greta Gerwig. She recently agreed with comedian Jo Koy's joke that her box office hit was based on a plastic doll with large breasts. Koy made the joke during his opening monologue at an award ceremony, comparing "Barbie" to the Pulitzer Prize-winning book "Oppenheimer." 

While some criticized the joke as sexist, Gerwig admitted that Koy had a point.

She stated in an interview with BBC Radio 4's "Today" program that Barbie was the first mass-produced doll with breasts, so Koy was correct. Gerwig also praised Ruth Handler, the creator of Barbie, for making the doll a blank canvas for girls to project themselves onto. 

She explained that Handler realized her daughter wanted to pretend to be a grown woman, not a mother, while playing with dolls.

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