Comfort zone

It is a distance from other people. You feel uncomfortable when people enter your zone. This zone is bigger for strangers and smaller for friends. 

Strangers in public places should be at least 4 meters away from you (if you are not talking with each other)

Friends can be as close as 1-2 m.

Close friends and family members can stay within the range of 30 cm - 1 m. 

Partners” minus distance ?

When you break this rule and go too close to others, you intimidate them.