There might come a time when your man is supporting you. Maybe you go back to school or you lose your job unexpectedly, whatever the reason, you’re carrying a copy of your boyfriend’s credit card now. He makes enough money to support both of you for the time being, and you’re confident enough in the relationship to accept the help. But, naturally, when you’re swiping somebody else’s card, you think twice before a purchase. So what are the do’s and don’ts of spending his money?