Crumpled up dollars.

My wife sidled up to me and leaned forward giving me a good look at her cleavage.

"Have you ever seen a twenty-dollar bill crumpled up in a very interesting way?" she asked.
"No", I answered.

She gave me a sexy little smile, slowly reached deep into her cleavage and
pulled out a crumpled $20 bill.

"Have you ever seen a fifty-dollar bill all crumpled up?" she asked, and I shook my head.
She gave me another sexy little smile, reached under her dress into her panties and
pulled out a crumpled $50 bill.

"Now," she said, "have you ever seen twenty thousand dollars all crumpled up?"
Intrigued, I slowly shook my head.
"Well," she said, "go take a look in the garage..."