It is not unusual for the underlying cause of itching to be eliminated by your veterinarian only to have the pet continue to scratch and lick itself from force of habit. (2ndchance.info)
«It's exceedingly difficult for reason to challenge the powerful forces of habit,» he writes. (dotearth.blogs.nytimes.com)
Force of habit often means that some do what they've always done when they've gone away. (aluxurytravelblog.com)