Even the BDSM test is sexist. There is a question about whether you believe women are meant to serve men. There are assumptions that getting penetrated is submissive. There are assumptions about what is and isn’t degrading. How do you even degrade a man in bed? The only way I have seen is through feminization.
It’s ignorant to think there isn’t sexism behind the fact that far more women take on a submissive role in bed. This is an obvious side effect of framing sex around male pleasure and orgasm, cultural suppression of female sexuality, gender inequality in society in general, women being socialized to defer and please others in all aspects of life at an early age, etc.