It's wrong to bother people relentlessly.
Derrick loaned his friend some money, and his friend promised to pay him back.
Derrick wants to be repaid.
Derrick waits a few weeks before bringing up the loan again.
Derrick asks his friend every day if he has the money.
Derrick's friend pays him back.
Derrick's friend gets mad at Derrick for asking so much.