Ethical?

[magid]

I went to the shoe store, and a man asked which of two pairs of shoes I thought would be better for him. I pointed out the (few) differences that I could see, and went on with my perusal of the Timberland display. A minute or two later, he asked a salesperson if he and 'his cousin' (me) could use the buy one get one at half price deal, and the guy said yes. In the end, I wasn't going to wait for a very indecisive guy to make up his mind, so I paid and left. Would it have been right to do this, though? Other pairs of people were, in fact, using the sale as one pair for each, if that makes a difference.

I stopped at Harvest on the way home to pick up a few last groceries. When I unpacked the bag at home, there was a bunch of bananas in the bag. I didn't buy bananas, and they weren't on the receipt. I should bring them back, I suppose, but it's frigid out tonight, and I have cooking to do. Should I keep them? It feels a bit like petty theft, but I didn't take them. Is this like returning a lost item, or a different category entirely?