What do men prefer, beauty or brains? According to a British evolutionary biologist, men prefer intelligence over big breasts and long legs when it comes to choosing a life partner. Professor David Bainbridge claims men find women with bigger brains more desirable as it is more likely they will be a responsible mother. A top scientist has revealed women’s most obvious charms - bigger brains. Evolutionary biologist Professor David Bainbridge claims men value intelligence over breast size when they are searching for a future wife. The Cambridge academic said brains suggest a woman is likely to be a responsible mother. It also indicates she was brought by intelligent parents and so was likely to be well fed and looked after in childhood, and so healthier. Other supposed attractive female features such as long legs don’t matter to men either, according to Professor Bainbridge. He said men only value symmetrical features because they suggest a potential partner is young, healthy and has stable genes. As a result, he said, men are not even interested in the size of a woman’s breasts - because they are rarely symmetrical.