Mums all over the world, please take note: Baby boys who have a nanny 'turn into womanisers', claims a psychiatrist. The Telegraph reported, child-rearing responsibilities too soon risks equipping your son with life-long double standards when it comes to women, Dr Dennis Friedman say in his book The Unsolicited Gift. "It introduces him to the concept of The Other Woman," said Dr Friedman who is 85. "It creates a division in his mind between the woman he knows to be his natural mother and the woman with whom he has real hands-on relationship: the woman who bathes him and takes him to the park, and with whom he feels completely at one. "As a result, he grows up with the idea that although he will one day go through all the social and sexual formalities of marriage, he will have at the back of his mind the notion of this other woman, who not only knows, but caters for, all his needs," the expert added. In case of girls, if they have a nanny to look after them they will be filled with a "vacuum of need" inside them which they fill in a variety of ways such as drink, drugs, sex or money. He said the solution was not to employ a nanny or au pair until after the baby's first birthday.