André Tridon (Translator) 
Psychoanalysis and Love [PDF ebook] 

Analyzing what makes us 'love', what factors determine our choices in loving, and how and why we react to various ideas of love, and sex.
Very interesting to read a book 90 years old about psycholanalysis! Much of the book is almost funny, expecially the parts about older men marrying younger women. Great idea for the old, not so much for the younger person!