The old lady looked surprised, but didn't say a word.
The old man continued, "For $10 I'll do it with you on that nice soft sofa over there, but for $20 I'll take you back to my room, light some candles, and give you the most romantic evening you've ever had in your life."
The old lady still says nothing, but after a couple minutes, starts digging down in her purse. She pulls out a wrinkled $20 bill and holds it up.
"So you want the nice romantic evening in my room," says the old man.
"Get serious," she replies.
Spoiler: