My friend Mark had an accident and I think he needs help paying for it. Would you give me some money to help Mark pay for his medical bills? Thank you, I'll just put it in my bank account until Mark asks me for the it.
Trust me, I'm trying very hard to let Mark know I have money for him. I'm going to send a letter to his parent's house so he knows that I have money for him, but only when I get $100. In the mean time I'll just hold on to the money.
Oh Mark never got the money you gave me to give to him?
Well, you only gave me $75 so I never sent him a letter.
Well, it turns out Mark isn't on speaking terms with his parents, so he never got the letter.
Well, he has health insurance and didn't need the money after all.
Where's the money now? I guess it's still in my bank account. No you can't have it back.