Read the following dialogue from Act IV, Scene 2 from Romeo and Juliet:

Capulet: So many guests invite as here are writ.--
[Exit first Servant.]
Sirrah, go hire me twenty cunning cooks.
Second Servant: You shall have none ill, sir; for I'll try if they can lick their fingers.
Capulet: How canst thou try them so?
Second Servant: Marry, sir 'tis an ill cook that cannot lick his own fingers: therefore he cannot lick his fingers goes not with me

Capulet is instructing his second servant to hire twenty clever cooks for the feast in the next scene. The second servant reassures Capulet that he will make sure they are skilled by testing if they can "lick their fingers," implying that a good cook should be able to savor their own food. Capulet is pleased with the servant's logic and agrees with his method of selection.