The erotic movie Fifty Shades of Grey, due to be released on Valentines Day, should be boycotted because it "glamorises sexual violence", Family First says.
Moviegoers should instead donate the admission fee to their local Women's Refuge, the lobby group's national director Bob McCoskrie said.
The movie, based on the novel by British author EL James, traces the relationship between college graduate Anastasia Steele and wealthy businessman Christian Grey.
Bondage and discipline, dominance and submission feature heavily in the plot.
Mr McCoskrie has called on families to use the release of the movie as an opportunity to have a discussion with their youngsters about real respect and intimacy in relationships.