How old are you; I went through a period in my late teens and 20's where I wouldn't bathe like that; I believe a lot of it had to do with my upbringing/ongoing relationship with my stepmother; even in my 20's and later when I had long since moved out of my parents house into my own living relationship and was in therapy, etc.

Do you have/have you had anyone you perceive as "controlling" in your life? I think, for me, it was a little like eating/not eating is for women with anorexia (like Karen Carpenter).