It's unhygienic not to wash your hands
Andrea has a cold and when coughing covers up her mouth with her palm to keep the germs away from her husband.
Andrea wants to wipe her palm off.
Andrea goes to the sink and washes her palms with soap and water.
Andrea grabs a paper towel and gets the mucus off her palm.
Andrea is able to keep her husband from catching her cold.
When touching other objects around the house, Andrea spreads germs and infects her husband.