For the author, the study of sex is much broader and more interesting than we imagine, from the endocrine and physiological side, but also from psychology and sociology.

Retraction is a compulsory literary genre: it is only written by one who has no other choice, and it does not pursue fame. Except for a few media cases, retractions go unnoticed by the public. What makes for hot news?

Biparental care is observed in less than 10 % of mammals and are often associated to monogamous relationships or immature offspring.

When we talk about species without sexual dimorphism, we should complete the sentence with a small note: species without a sort of sexual dimorphism that we can detect.