Credits to kenlui for summarising the 3rd chapter!

Chapter 3: Men Go to Their Caves and Women Talk

Introduction
One of the biggest differences between men and women is how they cope with stress. Men become increasingly focused and withdrawn while women become increasing overwhelmed and emotionally involved. At these times, a man's needs for feeling good are different from a woman's. He feels better by solving problems while she feels better by talking about problems.

Finding Relief in the Cave
When a man is stressed he will withdraw into the cave of his mind and focus on solving a problem. He generally picks the most urgent problem or the most difficult. He becomes so focused on solving this one problem that he temporarily loses awareness of everything else. Other problems and responsibilities fade into the background.

His full awareness is not present because he is mulling over his problems, hoping to find a solution. The more stressed he is, the more gripped by the problem he will be. At such times he may be incapable of giving a woman the attention and feeling that she normally receives.

Summary : To feel better, Martians go to their caves to solve problems alone. As for Venusians, they get together and openly talk about their problems.