"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.

>>44
I have to be physical in a metaphysical world! Teleportation over TCP/IP hasn't been invented yet! So astral projection is the next best substitute! Where do you live ":/" emoticon user! I can insure you that I am no coward! We can talk this out like men on the astral plane! I was typing fast, OK !