Is it normal to have a urge to walk on all four in public?
Yes,I do have this urge.It mostly appears when I'm really tired or when my back hurts.As a child I've walked on all four until the age of 7 (but not in public).I continued until I was 11,when my mother decided to stay home.Now I stay on all four when I'm stressed/frustrated/depressed (just like other people staying in fetal position when dealing with these negative emotions).It makes me feel better.
One year ago,here appeared this urge.ONLY WHILE I'M IN PUBLIC.