In a major study of human mating done in 1989, evolutionary psychologist David Buss found that in each of the 37 cultures he surveyed, men preferred to marry younger women, by an average of 2.66 years, and women preferred older men, by an average of 3.42 years.
Herein, do guys prefer younger or older?
Many men are not very open and vocal about their sexual desires and preferences but a recent study conducted confirms that men prefer younger women even if they are much older in age. Women, on the other hand, are more comfortable with someone close to their own age or slightly older.