The weakness of women quite often serves as a change in their relations with men. Sometimes it is favorable to ladies to be helpless to get care and support of a strong half. At the same time women, as we know, and "at full tilt will stop a horse", and "will enter the burning log hut". Physiologists, psychologists, geneticists and other experts have observations in this respect.
Men differ from women in existence of a Y-chromosome (XY against XX set). Have because of specifics of gene set of the man schizophrenia and psychoses more often. But women are more subject to a depression. As showed the researches conducted during training of astronauts at ladies resistance to stress threshold is higher, but at the same time their indicators return to normal after a shock longer. That is in an emergency situation they are capable to make the correct decisions, but after that their working capacity is broken on longer, in comparison with men, time.
Production of men's hormone of testosterone begins at embryos boys at a stage of pre-natal development. Testosterone, including, stimulates development of the left hemisphere of a brain which is responsible for rational thinking. Therefore husband's are more rational and logical, then so women are emotional, inclined to rely on an intuition and own feelings. Sometimes the ability to empathy and impressionability can really be taken for weakness.
The fact that men are stronger physically is confirmed by both daily experience, and medical data. At women the muscular corset is less developed, and not so powerful bone tissue especially as after certain age (with approach of a menopause) calcium is washed away from an organism. At the same time, men are more subject to diseases of heart (here the role in protection of the main muscle and vessels of women estrogen plays women's hormone). Psychologically the weakness is a part of a gender role of women. The root of this phenomenon can be found in zoopsychology. In the nature steady couples are formed by those animals whose female the long time after the birth of posterity is not able to support itself because of continuous care of cubs. And the human baby is adapted for life hardly most not less other types. So at the subconscious level the woman looks for the partner with whom she will be able to stay weak and defenseless. Girls are capable to cope with a set of routine tasks, and at the same time. Nevertheless, the wise woman allows the second half to take care of herself from time to time.