Generally, well-socialized birds are gentle and friendly. Some cockatiels enjoy physical contact, lending themselves well to taming. Cockatiels and their owners often develop shared rituals such as petting, scratching and preening. A cockatiel that wishes to be petted will often lower its head or nibble at the owner's fingers to indicate that it wishes to have its head and neck scratched (two places it can't easily scratch on its own), and will emit a low squeak to show its pleasure. Cockatiels which are hand-fed from a young age often enjoy physical contact.