"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.

>>19
That wasn't a misspelling. You used ``your'' in the wrong context.
http://www.wsu.edu/~brians/errors/your.html
Basic freaking grammar.

>>20
He uses ":/" at the end of every sentence.