PIEDMONT — When people have to check a little box on a form to indicate what gender they are, there are usually only two answers to the question — male or female.

This topic is explored in depth by Berkeley-based filmmaker Lonny Shavelson’s documentary “Three to Infinity: Beyond Two Genders,” playing Wednesday at the Ellen Driscoll Playhouse, 325 Highland Ave. in Piedmont, and Oct. 3 at The New Parkway, 474 24th St. in Oakland. The free screenings are co-sponsored by the Piedmont League of Women Voters, the Piedmont Appreciating Diversity Committee and The New Parkway. And they are meant to change your way of thinking about gender.”There are many people that don’t want to choose between two genders,” Piedmont Appreciating Diversity Committee member Julie Chang said. “What I liked about the film is that if you don’t know about people between genders, you learn about these fascinating peoples’ lives and get more of an understanding about their lives.””Three to Infinity: Beyond Two Genders” is the first of six films that will be screened during the Appreciating Diversity Film Series in Piedmont. It was chosen unanimously by the series’ committee after they each watched the film individually.”For lack of a better term,” said committee member Ilene Wagner, “it’s mind-blowing. You have to rethink your way of relating to people in the outside world.”Generally, people look at one another’s hair, clothing and body shape, she said, and they think, “man” or “woman.” Watching this film caused Wagner to question all of her assumptions about other people simply based on looks.

“You look at somebody, and you put them in a category. It makes you notice what you do as a human being,” Wagner said. “This is challenging to that. I think it’s really healthy. It’s also really difficult.”

The film was recently featured favorably in The New York Times and has previously been shown in San Francisco. The evening event will start with a 6:30 p.m. reception, and the film will show at 7 p.m. Director Shavelson and people spotlighted in the documentary will then lead a discussion about gender fluidity for about a half-hour. Although the movie is focused on sexuality, there is no sexual content and organizers say it’s appropriate for audiences ages 12 and older.

“This will give you a starting place to begin a conversation,” Wagner said. “It has you consider just how strong our self-definition is and what we’re willing to go through to be in sync with what we feel we are.”

People born as women explain why they had their breasts removed to feel more comfortable in their skin while parents talk about how they’ve come to understand their children’s gender-fluid identities. “They are just people, human beings,” Chang said. “The first thing is that they’re human beings, the second is that they’re gender-fluid.”

The next film in the series will be “The Hunting Ground,” a documentary exploring the complexities of on-campus sexuality and campus rape.