"What is it that makes dominant women uncomfortable with femdom? There are a lot of things. One of the biggest is the sexist attitude that is rampant in the BDSM community. It often seems like women have to remain ice queens, untarnished by actually having penile-vaginal intercourse with their male subs. However, if they want to they can become more male, and thus, more dominant by strapping on and becoming – duh duh duh – The Penetrator. This isn’t to say that there’s anything wrong with strapping on (I’m a fan myself), but a sex act does not a Dominant (or a submissive) make and we can’t just superimpose the male-female dichotomy onto Dominant-submissive and expect that to make anyone happy."
— The devaluation of male submission « Delving into Deviance (via sexisnottheenemy)