They have a very short memory. That operational, that short-term, that long-term - is much shorter, than man's. Roughly speaking, it works at the level of +/- 3 pieces of information. As an example and a metaphor: They remember three days ago. And three previous events reconstruct the events of the past three days.
Here you are, man, gave a woman something, for example. This "something" can be anything - a bottle of beer, a trip to the resort, a ring, a yacht, a personal plane, finally it does not matter. Exactly three days later, she forgot that you gave her, but still thinks that you give her this "something" again. Well, plus or minus two days. And you do not give. For you it was recently. As soon as the +3 units of time passed, everything, she forgot forever. But the more a gift, the longer she remembers it.
He remembers the peaches for three days. The ring is three weeks old. The apartment is three months old. Son - three years.
Once again - 3-1-3. The day when you bring the mammoth gradually moves along the tape of time. Have brought - the fireworks of happiness. Three days - a fountain of positive emotions. Three more - a trickle of good mood. And then it all ended. Ahead only horror hopeless.
In a long-term memory, the woman has only bad. She does not remember sharing barbecue, shish kebabs or traveling together to a distant lake. On this day, she will undoubtedly be happy. Only happiness in her memory is not postponed. In a year she will remember only the broken wheel on the way to this lake. Because their brains are sharpened to save only the bad. To endure and feed offspring - it is necessary to be able to expect a danger. Be ready for anything bad. It's such a feminine essence. This does not change.
A woman does not know how to use the second alarm system. All her hints are the first signal. Gestures, facial expressions, smells, touches. She can not say straight. Undeveloped anterior lobes of the brain.