1. Riding the subway.

2. Throwing away trash in a public setting.

3. Actually, anything involving trash in general.
4. Meeting someone new.
5. Sharing food with a friend.

6. Drying your hands.

7. Opening doors.
8. Sharing a drink.
9. Using a water fountain.
10. Going to the gym.
11. Attending a party with chips and dip.
12. When a pet eats from your dishes.
13. Preparing to make dinner.
14. Going camping.
15. Making s'mores.

16. Working in the garden.
