You should always pay back your friends.
Lisa is out shopping with friends but has run out of money.
Lisa wants a shirt that is on sale.
Lisa asks her friend for a loan and pays her back that friday when she is paid.
Lisa asks her friend for a loan but stops taking her calls after to avoid paying the loan back.
Lisa's friend appreciates her honesty and Lisa enjoys her new shirt guilt free.
Lisa is kicked out of her friend group for being a con.