Our gustatory system allows us to recognize five basic taste sensations.
This sense assists in keeping us safe through preventing the ingestion of things which may be inedible, spoiled, or even toxic. The gustatory system plays an important role in eating and drinking, along with working with texture, temperature, and sense of smell to percieve flavor.
Inadequate oral input may be reflected through children putting inedible objests in their mouths or refusing to eat select foods.
https://www.nspt4kids.com/health-topics-and-concerns/sensory-processing-disorder/understanding-sensory-processing-disorder-the-gustatory-system/