Sallie Tisdale. Talk dirty to ma: an intimate philosophy of sex. - New York, Anchor Books, 2014. - 340 p.

The author is an award-winning essayist. 

“Perversity, like obscenity, is a relative condition; we define it for ourselves… What about the secret things most of us most of us do now and then, or wish we could do, but never speak about? Like algolagnia, otherwise painful sensations that turn into sexual pleasure, like the getting and giving of hickeys, scratches, love bites, and pinches. Like spanking, whipping, slapping. What about begging, please, talk dirty to me, dear?” [Tisdale, 2014: 104, 108 - 109]