How is it theft it its in the middle of the street? Im not theiving it from anyone or a house.
Because you're taking something that doesn't belong to you with intention of depriving the original owner of said item.
It doesn't matter if you find it in the street, 'finders keepers' stops working when you're 5. People don't just decide to leave an iPod on the floor because they don't want it anymore, that's someones lost property and keeping it is stealing it, because it isn't yours.