(we tried it too, it just tasted like watermelon rhine)
He first tried begging for it... Then he tried his eye hypnotizing stare... but he didn't get a piece until he did his newest trick we've been teaching him, "shake". Success! He then got his watermelon piece and was a happy boy... He also got to eat up my dog's leftovers, which he did quite sneakily and FAST (too not get caught I think)...
Once he had a full watermelon belly, it was laptime!