related story
Last deer season, I was looking for something in my truck for a friend and came up with a couple 12 guage rifled slug shells, unfired. I handed them to my friend and said "Here, hold these". He looked a little surprised/scared, but we have known each other forever and he trusts me, so he hung onto them. I finally found whatever it was I was looking for, and went to take the shells back. I told him he could keep one if he wanted. He's never been into guns so I figured maybe some baby steps.
"Has this been fired?"
"No."
"How do you know?"
"Because it isn't empty."
"How can you tell?"
"Well, you see that big grey thing sitting just inside the one end?"
"Yeah"
"That's the slug"
"Slug?"
"The bullet" (gotta speak their language)
"So, this hasn't been fired?"
"If it had, the slug would be embedded in a tree somewhere with deer blood on it, not inside the shell in your hand."
"So you could put this in a gun right now and fire it off?"
"Yes"
"So could it go off in my pocket?"
"Nope"
"What if it hit my keys just right?"
"Nope"
"Okay, cool! I'm just gonna carry it around"
He puts it in his coat pocket and as far as I know, it's still there to this day!
"Okay, don't forget it when you get on a plane."