Imagine yourself sitting around a table at your local cigar shop. There you are, puffing away on your favorite cigar, talking with the guys, when suddenly the door opens. In walks one of the regulars with a smile on his face. A cheerful greeting is exchanged and this individual places a bottle of liquor in the middle of the table and asks who would like some before grabbing a few glasses.
To go along with the story, lets go ahead and pretend that this type of generosity happens fairly regularly, with more than one individual. When finished, rather than taking the bottle home with them, often times it is left behind.
Based on the scenario above, lets assume that you brought a bottle of something into the lounge one day. After a couple of drinks you leave the bottle at the shop with plans to come back to it later. The next time you come in, you find that a glass or two is missing from the bottle. Are you upset that someone has helped themselves to your liquor?