Hypothetical situation: you're walking down a street at night. All of a sudden you find, lying on the sidewalk, a brand new pair of expensive designer jeans. They happen to be in your size and they're definitely something you'd love to own for yourself. Assume that they appear new, clean and undamaged. There are no houses around, and no indication as to who they might belong to. Assume that there is no one else around and that you can pick them up and take them home without being seen by anyone.
In the hypothetical above, do you take the jeans home?
Same hypothetical as in the previous question, only instead of jeans, it's expensive designer underwear. Something very expensive and something you'd definitely wear. Do you take the underwear home?