Why I Have a Stop Sign in My Car

"I was a little mad because you took the water away."

"Yeah, I was a little mad, too, because you kept spitting the water out."

"Yeah."

"I keep telling you not to spit the water out, but you keep doing it. Do you have any ideas on how I can get you to stop?"

"Yeah. You should have a stop sign in the car. Then you could show it and say, 'Stop!' when I spit the water out."

"And then you'd stop?"

"Yeah."

"That's a good idea. Should we make a stop sign when we get home?"

"Yeah."

"OK."