How boys are different than girls

I am raising a boy and a girl. 

Anyone who says their differences are simply a matter of upbringing are simply not right.

Case and point:

Last night, my children were riding their bikes in front of our house. At one point, my son started crying loudly and ran to me, showing a large, painful looking scrape on his elbow. Figuring he just fell on his way down the driveway, I consoled him and when to pick up his bike. 

That is when I noticed the dog, who had been enjoying the weather with us on his chain in the front yard was no longer attached to the line.

At the same time, I realize my still-screaming son is actually saying something. "I just wanted to see what would happen!" he yelled.

Oh, no. 

I approached the bike and saw what happened. He had unhooked the dog, attached the chain to his bike and when riding full speed down the gravel driveway.

It seems he didn't completely think this plan through. I just wanted to see what would happen. He learned, alright. Not through observing what happens to the dog when he gets to the end of the chain. Not by thinking through the likely outcomes, but by attaching himself to a chain and taking off.