Dative verbs: schmecken and gefallen
In English, you say "I like the chocolate." In German, verbs for expressing appeal—like schmecken (to taste good) and gefallen (to be pleasing / to like)—work in reverse.
The thing being liked or tasted is the subject (Nominative), and the person experiencing it is the Dative object. You are literally saying, "The chocolate is tasty to me" or "The color is pleasing to you."
If the things being liked or tasted are plural, the verb must also take its plural form.
Helfen and danken
Some common action verbs also strictly require the Dative case, completely bypassing the direct (Accusative) object. Two of the most important are helfen (to help) and danken (to thank).
Think of these as "giving help to" or "giving thanks to" someone.
Using nouns with Dative verbs
So far, we have looked at Dative pronouns (mir, dir, uns, euch). If the Dative object is a noun rather than a pronoun, its article must change to match the Dative case.
For example, the feminine article die becomes der in the Dative.