I don't want to necro that part of the threat, but it is clear to me that morality is by definition derived from biological evolution, especially in the long term. Simply because a society that does not put value in procreation will inevitably die out. Thus, religion may say "big daddy tells you to stick it this way", but in effect, it is closer to Darwin than so-called "atheists" who say "you are free to stick wherever you like". On a collective level, no, "you" are not free to do anything - we as gene-machines are all bound by Nature and get dominated by the reality of collective survival (more precisely, genetic survival, but it's close enough, honestly). As evolutionists say, give it enough time. And time is exactly what individualists lack the grasp of.
(Incidentally, this is also the way I philosophically view femdom in - as submission to impersonal, divine desire.)
On the topic, I would like to admit my pleasure that unlike in mainstream Californian pornography with big dudes, or even in the more sentimental and high-IQ Japanese AV industry, femdom games seem to be far less centred on pegging. I have always been appalled at how such a simple concept as sexual role reversal often degenerates into "domination = penetration", "domination = whipping", "domination = cuckoldry"... Why is it so hard? (Somewhat ironic, because I would turn it all into bondage, but still, to me, the main part about any relationship is supposed to be love - pain, foot-sniffing and alimony are optional extras).