Hope it's not their honeymoon

"Hi. I need new room keys because my idiot husband de-magnetized these."
"I didn't de-magnetize them."
"Didn't they tell you earlier that if you keep them near a cell phone they could de-magnetize?"
"Yeah..."
"And you kept them in your cell phone holster. With your cell phone."
"You know I don't carry a wallet. Where was I supposed to keep them?"
"..."
"So I didn't de-magnetize them, the cell phone did."
"Like I said, you're an idiot."