As I speculated in the previous post, most laughter is social and the reason that babies find dogs so funny is because dogs are extremely social creatures. This video illustrates the point beautifully:
Hernan has Down Syndrome and he does not like to be touched. Hernan’s mother Ana watched as Himalaya, the dog, was so patient and soft with her son that he finally gave in and started a friendship that made everyone online smile. via Dog Takes His Time With Boy Who Has Down Syndrome & Does Not Like To Be Touched.
Thanks to Nisha for the link.