"laziness"

Hello /sci/,
Could you explain to me why people are willing to go out of their way "to be lazy".
Examples:
  Walking an extra 20 feet to the automatic door instead of pushing open the other door.
  Waiting an additional 5 minutes instead of going up a flight of stairs.
I'm sure you've observed others. Is it just a habit people get into? Has there ever been a study into this.

>>52
Says the guy who refuses to talk this out like men in the astral plane! Are you an coward! You don't know what power that people can hold! And you don't know what goes on in there heads!