finger

it fits all the stuff. bend it, confront people with it, etc

finger

Everyone more or less needs them and can use them many times in different ways. You sometimes only use a part, such as the fingertip or fingerprint, sometimes use most of it. You can bend your finger at will. You can use to scare, confuse and question with gesture, i.e. the Middle Finger, air quotes etc, and confront people by pointing at them and you absolutely use them everyday. Seems to fit every part to me.