But what are they for?

So, the boys (ages 9,9,8) are sitting in the backseat of the minivan (of course, what did you think I drove?) punching and poking and pulling at each other on the short ride to soccer practice.
One of them says: "Come on guys, Mom said no more punching each other in the nuts!"
And another says: "I know but why can't we punch each other in the nuts?"
Someone else says: "Yeah, mom, what's in there that can get hurt?"
And I say after realizing this could go in many different directions depending on how I handle it: "Stuff," I handily come up with, glancing in the rearview mirror to see how this will be taken.
"But what kinda stuff. What are they for," comes a voice from the back.
"Stuff for when you grow up and want to have kids," I throw out there and take a right turn toward the school.
"WE HAVE KIDS IN THERE!" Boo exclaims.
This is no kidding funny stuff for the blog, I think immediately.
"No, you don't have kids in there."
"But what is it then?" he queries.
Stick to the facts reporter, I tell myself.
"It's liquid guys, ok. Let's just move on now."
To which the Bean, always good for a grand statement, holds up a finger in the air and declares : "I know that's the reason why the human body is 98 percent liquid water."


Post Script: The funniest thing to me is that this similar conversation happened to my friend Jill and her three boys back in Michigan a few years ago. But those boys reasoned that two nuts meant two kids. She had to laugh wondering if they thought a friend of ours with five kids at the time, had a whole bunch of them!