Personal space commonalities

The article about personal space gives several examples of how different cultures vary regarding personal space norms. One commonality in almost all cultures is that women prefer more personal space from strangers than men. A second commonality is that as humans age, they prefer more personal space from strangers. 1. In 100-150 words, explain both of the personal space commonalities above. That is, why do women prefer more personal space from strangers than men; and why do older people prefer more space from strangers than younger people?