The inbuilt problem in the 'whatever turns you on' creed is that what turns one person on does not necessarily turn on his partner. The prostitute who caters to the nappy-wearers might not herself get off on suckling stubbly men, but she was, is, happy to provide the service if, and only if, she is handsomely paid for it. The reality is that most women participate in sex games because there is no other route by which they can enter into what passes for intimacy with the person they love. Many sex workers find the faking of pleasure a service too far, and draw the line at pretending to enjoy whatever it is the client wants them to do. In an unfree society, most of the activities called consensual represent the capitulation of the powerless to the demands of the powerful.
Power comes in various guises, as money, status, patriarchy, and as emotional invulnerability.
The purpose of pornography is to arouse desire in the absence of desire, to raise appetite where no hunger exists, so as to provide a market in which the purveyors of pleasure can make their living and their profits. People who have no desire to eat a piece of bread and butter, because they are not hungry, can be stimulated to desire chocolate if the chocolate is presented to them as something more than food, as ecstasy, rhapsody or orgasm. Commercially produced food is also fake food, not made principally of the substances mentioned on the label, but with chemical analogues and fillers, and laced with taste additives and excessive amounts of salt and sweeteners. Your healthy yoghurt-coated apricot pieces are mostly vegetable fat and sugar, neither of which is mentioned on the label. In a similar way, commercial fast sex is fake sex, divorced from both passion and reproduction.