This was actually really hard to write

Thanks to @1000Couples for this suggestion

1. Make kisses faces at them

2. Play sappy love music around them

3. Have them retell their story of how they feel in love, make gagging noises 

4. Sing the k-i-s-s-i-n-g song

5. Use the nicknames they gave to each other

6. Mock their compliments

7. Get between them when they kiss

8. Every time they leave the room, ask if they're 'going to make love' (don't do this if you are younger than 8 or older 30)

9. Mess with them any way you can

10. Ask them is they are still in love every 30 minutes

11. Walk into the room as soon as they think they are alone

12. Sing the k-i-s-s-i-n-g song again

13. Sing it again

14. and again

15. and again

15. and again

16. and again

17. and one more time

18. Then sing it backwards

19. Ask them when they're going to have a baby

20. Make more gagging noise when they show affection for each other 

21. Sing the k-i-s-s-i-n-g song one more time

22. Agree with them to stop with the song

23. Wait  4 weeks before singing the song again

24. But this time get the whole crew to sing along 

25. Sit between them when in meetings

26. Interrupt their conversations 

27. Never leave their side

28. Always walk in the middle of them

29. Gag when the kiss

30. Annoy them

31. Sing the k-i-s-s-in-n-g

32. Do the song one last time