[Teracotage]

I think there is a more basic need for cravings which could be the shortage of minerals, iron deficiency causes some cravings:"Craving and chewing ice (pagophagia) is often associated with iron deficiency, with or without anemia, although the reason is unclear. At least one study indicates that ice chewing might increase alertness in people with iron deficiency anemia." https://www.mayoclinic.org/diseases-conditions/iron-deficien...