Saw a bar of Green & Blacks dark chocolate on ground just outside Tesco. Unopened, probably fallen out of someone's bag/ trolley.
Looked around and only saw one person loading her car post shopping so I went up and asked if it was hers. She said no, but she had also seen it on the ground on way out. So I went back and put the bar on a ledge off the ground but right next to where I had found it. It was very obvious to anyone walking by.
Finished shopping 40 mins later and chocolate was still there. Figured no one was going to come back looking for it now so I took it home.
I really don't think IWBU to take it home, other alternatives were leaving for someone else random or taking back into the shop, and what would they have done with it ?
So why do I feel so guilty eating it? 
I keep thinking of the poor person who was so looking forward to their treat and now won't have it [ sad]