Partners should be willing to do favors for each other.
Maryanne is at home talking to her husband on the phone who needs their spare set of keys because he has locked his keys out of the car.
Maryanne wants her husband to get home.
Maryanne tells her husband that she has the other set of keys and will be there shortly to open up the car doors.
Maryanne suggests to her husband that he call a towing agency rather than her bring him the spare set of keys.
Maryanne's husband thanks her profusely to show his appreciation.
Maryanne's husband cannot fathom why Maryanne thinks that is a good idea and resents her for not bringing him the spare keys.