The toughest P & R I did was a name brand shoe store that carried a style I actually wanted to buy for my trip overseas. I was allowed to purchase an extra item for myself, but had to purchase something to return as well. My plan was to purchase 2 different types of shoes that fit my stated needs, and return one later. No problem.
Except, after doing a beautiful job of open-ended questions to identify my specific needs, the employee happily told me that the store was having a "Buy 2 Shoes for $100" sale on many of their items. Who buys 2 pairs of $80-$90 shoes for $100 and then returns one of them?
So I had to find at least one shoe that fit the style of shoe I had already stated that I wanted but was not included in the sale. Meanwhile the employee was determined to help me get a bargain and kept bringing me sale items to try on. My instructions explicitly stated not to take up more than 20 minutes of her time.
After 15 minutes of excellent customer service I ran her train off the rails, abruptly choosing a non-sale pair for $70 (my keepers) and a second pair for $80 that would have been 2-for-$100....
....And then returned those to the same employee an hour later.
We are all here on earth to help others....What on earth the others are here for I don't know.
--W. H. Auden