Why the stairs?

So, we go on vacation to a nice, big house

and the boys favorite place to play...

The stairs....

Of all the spots, including outside...the stairs are the most dangerous.

I spent lots of time telling them to get off the stairs and stop throwing things up and down the stairs.

I gave up and said that they could play on the bottom 3 stairs, but it didn't last long as they crept up more.

And when I locked the little gate, they would try and hang on it which was even more dangerous...

Why do boys find the scariest things to play on and with!