This doddery old lady had fallen in love with a hideous dress, but she didn't have enough money. The shop bloke said he'd hold it at the till for her until next time. Then he held it up, and claimed to see some non-existent stains. 'Ohh, I dunno if those will come out. I don't like to sell people stuff with stains on, luv. You can just have it, if you like...' The old biddy shuffled off in raptures, like she'd won the lottery. It was so sweet.
What a nice man.