It's rude to shirk your turn for a shared duty.
Kristy and her roommate alternate days washing the dishes and Kristy sees a large pile of dishes on her day.
Kristy wants to address the large pile of dishes.
Kristy does the dishes since it's her day to do them.
Kristy asks her roommate to do the dishes for her.
Kristy's roommate will think Kristy is responsible and true to her word.
Kristy's roommate will think Kristy is not true to her word and lazy.