Things can be really confusing sometimes.
1. This: This:

2. And this: And this:

3. And this: And this:

4. This too: This too:

5. These friends: These friends:

6. And this family: And this family:

7. And these two: And these two:

8. These two, too: These two, too:

9. This: This:

11. And this:

12. Especially this:

13. And this, too: And this, too:

14. And this camping trip: And this camping trip:

15. This dog: This dog:

16. These friends: These friends:

17. This party: This party:

18. And bus seats: And bus seats:

WHO DESIGNS THEM WHAT IS THEIR PROBLEM