Published in May 1992, Men are from Mars & Women are from Venus is a book by John Gray offering many suggestions for improving men-women relationships in couples by understanding the communication style and emotional needs of the opposite gender. It spawned a series of follow-on books expanding on specific situations (see below).
The book, as suggested by the title, asserts the notion that men and women are as different as beings from other planets. Gray adopts this metaphor as the central theme of all his books and seminars, likening men and women to the classical Roman god Mars and goddess Venus as ideal types.
In contrast to some psychologists (and feminists) who emphasize similarities between the sexes, Gray writes almost exclusively about differences. Gray says that his "Martians" and "Venusians" are only stereotypes and cannot be applied blindly to individuals.An example of the theories it offers is that women complain about problems because they want their problems to be acknowledged, while men complain about problems because they are asking for solutions. Other concepts in the book are the difference between women and men's point systems and how they react under stress.