Whedon sees himself as a feminist. Feminist themes are common in his work. The best example is what he says is his habit of writing about "teenage girls with superpowers". This is seen in "Buffy", "Firefly", and "Serenity". Whedon says his mother is the reason for his feminist idea. When Roseanne Barr asked him how he could write so well for women, he replied, "If you met my mom, you wouldn't ask." 