Claim: Michalina Wisłocka is a Polish Gynecologist, sexologist, and author who co-wrote Sztuka kochania.
Evidence: Michalina Anna Wisłocka ([mʲi.xaˈlʲi.na ˈan̪ːa viˈswɔt͡ska; née Braun; 1 July 1921 – 5 February 2005) was a Polish gynecologist, sexologist, and author of Sztuka kochania (verbatim: The Art of Loving, English edition A Practical Guide to Marital Bliss, 1978), the first guide to sexual life in a communist country. 
Sztuka kochania (Polish title; literally The Art of Loving) published in English as A Practical Guide to Marital Bliss) is a popular sex manual written by the pioneering Polish sexologist Michalina Wisłocka, first published in 1978.