some people are so lazy

I get in the elevator at school on the 4th floor.
It stops on the 3rd floor.
Two people get in.
It stops on the 2nd floor.
Those two people get out.

..yes, the architects put stairs in the building for a reason.
I don't understand why people don't use the stairs more often, especially if they're only going up or down one floor.

It's no wonder obesity is becoming such a big problem.