Space

If you are accustomed to taking bus as major vehicle for transportation，you will see below phenomenon as I did。

In the bus，it appear people prefer picking the seat without neighbor，as long as there is the choice。

Some might take the seat beside aisle，so that diminish others’ attempt on walking in。

Some might place their belonging on empty seat，in stead of the ground to claim the possession in silence。

In short，people prefer having personal space when they are alone。

But why？when we are in the relationship，we are always accustomed to demanding the other to share their every space with us？

Why？