Both of the girls admit being ticklish and that they were extensively tickled by their parents. Quote "I totally could be tickled to death".
From 50:44:
https://www.youtube.com/ watch?v=OBSTsV5dLmg&t=3420s
From 50:44:
https://www.youtube.com/ watch?v=OBSTsV5dLmg&t=3420s