tetsujinnn

In real life, you’re starting a conversation on getting to know someone given a certain context (e.g in class, at an event, doing an activity etc.). The context gives you a starting point for getting to know each other. Online dating gives you no starting ground and conversations do not turn into dates.

There are two types of accounts in Ethereum, externally owned accounts (EOA) and contracts. EOA are controlled by private keys where contracts are not. Since the user sent ETH to a contract, he cannot get his ETH back if the contract does not have a method to transfer ETH back. Whereas if he sent ETH to an EOA then the user of that account can send him back ETH.