Stair way jokes

How did Stephen Hawking make it up the stairway to heaven?

Well, he didn’t; they invented an elevator.

What goes up and down but stays in the same place?

Stairs.

You know stairs, right? The dark... My there is something. I know that if you fall down the stairs, your balls will be crushed!

What goes up and down and does not move?

Stairs.

I hate stairs, they're always up to something.

I love stairs. They always bring me up.