At the time I entered this course entitled "Queer Cinema", I mentally translated the meaning to be "movies involving homosexuality". I believed that queer was a synonym for homosexual--that an antonym for "queer" would be "heterosexual" or "straight". Upon reflecting on the readings and really, reflecting on society, I came to understand that there is a wide range of sexual tendencies/desires/actions and to limit the "choices" to gay or straight would be like limiting voting to a two party system (which, in my bias, is wrong).
You may have seen a movie that came out earlier this year called "My Idiot Brother". The film first depicts the character Natalie (Zooey Deschanel) as a lesbian living with her girlfriend but soon Natalie sleeps with her man friend and characters surrounding Natalie reflect on Natalie's sexuality with ponderous exclamations like "yeah...we don't really know what Natalie is...she's well..no one really knows". Meanwhile, the main character Ned (unsuccessfully) attempts to engage in a threesome with a women and another man. Another main character named Dylan is having an affair with his film subject while his wife is home with the kids. All of these situations differ from the monogamous heterosexual relationship that so many of are told is "normal".
Although this is a somewhat trivial example, it opens discussions about the need to look beyond a dichotomy of sexual preferences.