I read this book because it was one of Kurt Vonnegut’s favorite books, and I was curious to read a favorite book of one of my favorite authors. It reads like a sex/love dictionary and has some interesting and valuable passages. I also liked the illustrations throughout.
However, this book was originally published in 1961 in Denmark with its intended audience being married couples in their 30’s (as is stated in the introduction). Both the tear of publication and narrow intended readership make for a pretty exclusive and outdated dictionary on sex/love. For example, it is taken for granted throughout the book that sex is between a man and a woman (besides the passage on “homosexuality”— an outdated and stigmatizing term). There are no entries for “queer”, “non-binary”, or transgender. There is an entry for “transvestism”, which, again, reflects the limited perspective of the time, and also of the cis, hetero authors.
All that being said, it has some interesting insights on hetero romantic love and sex, but should be read more as an interesting/amusing look into an old Danish sex-Ed book for married couples than as a prescription for modern love and sexuality.