What is a button?

I think that’s getting too literal. You press a thing, it does something. Functionally it’s a button regardless of what it looks like.

When I say metaphor, I’m talking about referring to something that isn’t functionally a button but might be described as such. Candy buttons, a belly button (outies, anyway), a nipple, or anything else that might also be referred to as a nub.

This thread needs a musical interlude.

This is a button: http://v10games.com/arcade/game-dontpushtheredbutton.htm

Huh. The buttons on my PS3 require no force; they’re capacitive sensors and I can lightly brush them. The power button on my Xbox 360 is a physical button. I clicks.