>Here is another problem, but it is of a quite different kind than the previous ones.
>
>A man, who lives on the 15th. floor of a building, uses the elevator every morning, when going to work, to go from the 15th. floor to ground level.
>
>In the evening, on his way back, he uses the elevator only up to the 8th. floor; he then uses the stairs to walk the remaining 7 floors.
>
>What reason can there be for such a behavior? (No, it is not a desire to exercise.)
>
>Hilmar.


I heard this once with an extra twist. On sunny days the man went to the 8th floor. When it was raining he went all the way to the 15th floor.