It's good to return people's wallets to them.
Dennis is walking his dog, and he finds a wallet laying by the curb.
Dennis wants to get home in a hurry because it has started to rain.
Dennis hurries home and calls the person that owns the wallet to tell them he found it and can return it.
Dennis hurries home with his dog and the wallet and decides he will keep the wallet because he needs the money.
The person that owns the wallet tells Dennis how grateful they are for getting their wallet back and offers him a reward.
Then Dennis feels guilty for keeping the wallet because he knows he didn't do the right thing.