Although there are no available details revealing why the events in this video pan out the way they do, we believe this seemingly unwarranted power-boop (power-boop is a friendlier way to say "assault") is a result of years of power struggle between these two tiny pooches. How long has this sanctioned spot on the couch been fought over? Months? Years? Eons in the odd chance these are both immortal dogs? We may never know, but what we do know is that it's freakin' hilarious regardless the reason.
h/t Kyoot Animals