The right - protect her against cars, etc.
The left - protect against muggers, etc.
Also, I'm left handed, which impacts door holding.
Most Helpful Opinion
Usually when I'm with my guy friends and we're out at night, or even during the day and walking around, they never let me walk on the cars, they always stand on either side of me, so I'm in the middle. But, when I'm with only one of them, they usually stand on the car side, never really heard of the mugger theory..