Did you know there is such a thing as Face Recognition? It is weird, but I have discovered programs which can be used to log you in via face, it stores your usernameand password and if your face matches the stored picture it automatically uses your username and password to log you in (this could be via Windows, or via websites..)
Not only that, but there seems to be also a Facial Expression Recognition which can detect if you are feeling:
-happiness
-disgust
-fear
-anger
-surprise
-sadness
There are plenty of other types of recognitions too, if you are wondering why the title is Recognition, here y'all should discuss the types of recognition programs (Voice recognition, etc.)
To add on to this: This is the type of things you'd add to a robot.